{"id":67985,"date":"2026-10-25T15:58:32","date_gmt":"2026-10-25T10:28:32","guid":{"rendered":"https:\/\/johnsonfrancis.org\/professional\/?p=67985"},"modified":"2026-10-25T16:21:42","modified_gmt":"2026-10-25T10:51:42","slug":"new-series-of-interactive-cardiology-mcqs-13","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/professional\/new-series-of-interactive-cardiology-mcqs-13\/","title":{"rendered":"New Series of Interactive Cardiology MCQs 13"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<!-- Cardiology MCQs Part 13 (Full 25 Questions) - WordPress Safe Custom HTML Block -->\n<script src=\"https:\/\/cdn.tailwindcss.com?plugins=forms,typography,aspect-ratio\"><\/script>\n<script>\n  tailwind.config = {\n    corePlugins: {\n      preflight: false,\n    }\n  }\n<\/script>\n\n<div id=\"mcq13-quiz-wrapper\" class=\"font-sans bg-slate-950 text-slate-100 p-4 md:p-8 rounded-3xl max-w-4xl mx-auto shadow-2xl relative overflow-hidden my-8 border border-solid border-purple-500\/20\" style=\"box-sizing: border-box;\">\n  \n  <!-- Background Accents -->\n  <div class=\"absolute top-0 left-0 w-full h-full pointer-events-none opacity-10 bg-[radial-gradient(ellipse_at_center,_var(--tw-gradient-stops))] from-indigo-500 via-purple-900 to-slate-950\"><\/div>\n  \n  <!-- Header Banner -->\n  <div class=\"relative text-center pb-6 border-b border-solid border-purple-500\/25 mb-8\">\n    <div class=\"inline-block bg-gradient-to-r from-red-600 via-pink-600 to-purple-600 text-white font-black text-xs md:text-sm px-4 py-1.5 rounded-full uppercase tracking-wider shadow-lg mb-3 animate-pulse\">\n      \u2764\ufe0f Advanced Cardiology Series &#8211; Part 13\n    <\/div>\n    <h1 class=\"text-3xl md:text-5xl font-extrabold tracking-tight text-transparent bg-clip-text bg-gradient-to-r from-cyan-300 via-blue-400 to-indigo-400 m-0\">\n      Interactive Cardiology MCQs #13\n    <\/h1>\n    <p class=\"text-sm md:text-lg text-slate-300 mt-2 max-w-2xl mx-auto font-medium\">\n      Post-Graduate Level Clinical &#038; Hemodynamic Masterclass\n    <\/p>\n  <\/div>\n\n  <!-- Real-Time Floating Scoreboard -->\n  <div class=\"sticky top-4 z-40 bg-slate-900\/90 backdrop-blur-md border-2 border-solid border-blue-500\/40 rounded-2xl p-4 mb-8 shadow-xl flex flex-wrap items-center justify-between gap-4\">\n    <div class=\"flex items-center gap-3\">\n      <div class=\"text-3xl\">\ud83c\udfc6<\/div>\n      <div>\n        <div class=\"text-[10px] uppercase font-extrabold tracking-widest text-blue-300\">Live Scoreboard<\/div>\n        <div class=\"text-lg md:text-2xl font-black text-cyan-300 flex items-center gap-1\">\n          <span id=\"mcq13-correct-count\">0<\/span><span class=\"text-slate-500 text-sm md:text-lg\">\/ 25 Correct<\/span>\n        <\/div>\n      <\/div>\n    <\/div>\n    <div class=\"flex items-center gap-2 bg-slate-950\/80 px-4 py-2 rounded-xl border border-solid border-slate-800\">\n      <span class=\"text-xs font-bold text-slate-400 uppercase tracking-wider\">Progress:<\/span>\n      <div class=\"w-24 md:w-36 bg-slate-800 h-3 rounded-full overflow-hidden\">\n        <div id=\"mcq13-progress-bar\" class=\"bg-gradient-to-r from-blue-500 to-cyan-400 h-full w-0 transition-all duration-300 rounded-full\"><\/div>\n      <\/div>\n      <span class=\"text-xs font-bold text-cyan-300\"><span id=\"mcq13-answered-count\">0<\/span>\/25<\/span>\n    <\/div>\n  <\/div>\n\n  <!-- Quiz Questions Container -->\n  <div class=\"space-y-8 relative\">\n\n    <!-- Q1 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q1<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          A patient with a continuous-flow left ventricular assist device (CF-LVAD) presents with syncope and a low-flow alarm. Echocardiography reveals a severely shifted interventricular septum toward the left ventricle and frequent premature ventricular contractions. What is the most likely diagnosis and appropriate initial management?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"A thrombus would typically present with power spikes (high wattage) and signs of hemolysis (high LDH), not primarily a leftward septal shift with low flow.\">A. Pump thrombosis; administer intravenous thrombolytics<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"A leftward septal shift indicates a 'suction event' where the LVAD is drawing more blood than the underfilled LV can provide, often due to hypovolemia or right ventricular failure. Initial management is volume expansion and reducing pump speed.\">B. Suction event due to hypovolemia; administer intravenous fluids and reduce pump speed<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Aortic insufficiency would cause a closed loop of regurgitant flow, leading to left ventricular dilation and increased (not decreased) flow readings on the LVAD monitor.\">C. De novo severe aortic insufficiency; refer for immediate surgical valve replacement<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Device infection typically presents with fever, driveline erythema, and sepsis, not isolated mechanical suction parameters.\">D. Driveline infection progressing to sepsis; initiate broad-spectrum antibiotics<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm md:text-base leading-relaxed\"><\/div>\n    <\/div>\n\n    <!-- Q2 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q2<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          According to ACC\/AHA and ESC guidelines, which anticoagulation strategy is recommended during the first trimester for a pregnant woman with a mechanical mitral valve whose pre-pregnancy warfarin dose requirement was 3 mg daily?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"If the therapeutic warfarin dose is &lt;= 5 mg\/day, the risk of warfarin embryopathy is exceptionally low (&lt;1%). Guidelines recommend continuing low-dose warfarin throughout the first trimester as it is vastly superior for preventing catastrophic maternal valve thrombosis compared to heparins.\">A. Continue warfarin throughout the first trimester<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"While LMWH is an option if the dose is &gt; 5 mg\/day, warfarin is preferred if the dose is &lt;= 5 mg\/day due to superior efficacy in preventing valve thrombosis.\">B. Switch to therapeutic Low-Molecular-Weight Heparin (LMWH) immediately<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Unfractionated heparin has a higher risk of maternal bleeding, osteoporosis, and valve thrombosis; it is not the first choice if the warfarin requirement is &lt;= 5 mg.\">C. Switch to continuous intravenous Unfractionated Heparin (UFH)<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"DOACs (like rivaroxaban) are absolutely contraindicated in patients with mechanical heart valves and during pregnancy.\">D. Switch to a Direct Oral Anticoagulant (DOAC) such as rivaroxaban<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm md:text-base leading-relaxed\"><\/div>\n    <\/div>\n\n    <!-- Q3 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q3<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          In patients with AL (light chain) cardiac amyloidosis, the Mayo Clinic staging system utilizes which two primary serum biomarkers to stratify disease severity and predict median survival?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Serum free light chain difference is used in the revised Mayo staging, but CRP is not a component.\">A. C-reactive protein (CRP) and Serum Free Light Chains<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"The original 2004 Mayo staging system for AL amyloidosis relies on cardiac troponin (T or I) and NT-proBNP. Both elevated = Stage III, one elevated = Stage II, neither = Stage I.\">B. Cardiac Troponin (cTn) and NT-proBNP<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Creatinine and albumin are important for renal staging but are not the primary drivers of the cardiac-specific Mayo survival staging.\">C. Serum Creatinine and Serum Albumin<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Beta-2 microglobulin is used in multiple myeloma staging (ISS), not specifically for AL cardiac amyloidosis.\">D. Beta-2 Microglobulin and Lactate Dehydrogenase (LDH)<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm md:text-base leading-relaxed\"><\/div>\n    <\/div>\n\n    <!-- Q4 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q4<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          During a catheter ablation procedure for typical, isthmus-dependent right atrial flutter, the electrophysiologist creates a linear lesion across the cavotricuspid isthmus (CTI). What are the anatomical boundaries of the CTI?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"These boundaries define the Triangle of Koch, which contains the AV node, not the CTI.\">A. The coronary sinus ostium, the tendon of Todaro, and the septal leaflet of the tricuspid valve<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"The cavotricuspid isthmus (CTI) is the narrow band of atrial tissue located between the inferior vena cava (IVC) and the tricuspid valve annulus. Ablating this isthmus breaks the macroreentrant circuit of typical atrial flutter.\">B. The inferior vena cava (IVC) and the tricuspid valve annulus<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"This is the target for left atrial flutter or atrial fibrillation (roof line), not typical right atrial flutter.\">C. The left superior pulmonary vein and the left atrial appendage<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"The crista terminalis is a structure in the right atrium that often serves as the posterior boundary of the typical flutter circuit, but the narrowest isthmus ablated is the CTI.\">D. The superior vena cava (SVC) and the crista terminalis<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm md:text-base leading-relaxed\"><\/div>\n    <\/div>\n\n    <!-- Q5 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q5<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          Which of the following describes the mechanism of action of bempedoic acid, a non-statin lipid-lowering therapy?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"This describes statins.\">A. It is a direct, reversible inhibitor of HMG-CoA reductase in the liver.<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"Bempedoic acid is a prodrug activated only in the liver (avoiding skeletal muscle toxicity). It inhibits ATP citrate lyase (ACL), an enzyme upstream of HMG-CoA reductase in the cholesterol biosynthesis pathway.\">B. It is an inhibitor of ATP citrate lyase (ACL), acting upstream of HMG-CoA reductase.<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"This describes ezetimibe.\">C. It inhibits the NPC1L1 transporter to reduce intestinal cholesterol absorption.<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"This describes PCSK9 inhibitors.\">D. It binds to and neutralizes circulating PCSK9.<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm md:text-base leading-relaxed\"><\/div>\n    <\/div>\n\n    <!-- Q6 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q6<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          Based on the landmark COAPT trial, which set of echocardiographic and clinical parameters identifies patients with secondary (functional) mitral regurgitation who benefit most from transcatheter edge-to-edge repair (TEER \/ MitraClip)?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"The MITRA-FR trial enrolled patients with more severely dilated LVs and less severe MR, showing no benefit.\">A. Severe LV dilation (LVESD &gt; 70 mm) with moderate mitral regurgitation (EROA 0.2 cm&sup2;)<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"The COAPT trial demonstrated that patients with 'disproportionate' MR\u2014meaning severe MR (EROA &gt;= 0.3 cm&sup2;) but an LV that is not massively dilated (LVESD &lt;= 70 mm)\u2014derive significant mortality and morbidity benefits from TEER.\">B. Severe mitral regurgitation (EROA &gt;= 0.3 cm&sup2;) with a non-massively dilated left ventricle (LVESD &lt;= 70 mm)<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Primary (degenerative) MR with flail leaflets is typically treated with surgical repair or TEER based on surgical risk, but COAPT specifically studied functional\/secondary MR in heart failure.\">C. Primary degenerative mitral regurgitation with a completely flail posterior leaflet<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Rheumatic mitral stenosis is a contraindication for TEER due to pre-existing high transvalvular gradients.\">D. Severe rheumatic mitral stenosis with concomitant moderate regurgitation<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm md:text-base leading-relaxed\"><\/div>\n    <\/div>\n\n    <!-- Q7 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q7<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          During simultaneous right and left heart catheterization, a patient exhibits a &#8220;dip and plateau&#8221; (square root) sign in both ventricular pressure tracings. Which hemodynamic feature reliably distinguishes constrictive pericarditis from restrictive cardiomyopathy?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"In constrictive pericarditis, the rigid pericardium fixes total cardiac volume. During inspiration, increased right heart filling forces the septum leftward, decreasing LV filling. This causes ventricular interdependence (discordance: RV systolic pressure rises while LV systolic pressure falls).\">A. Enhanced ventricular interdependence with respiratory discordance (RV and LV systolic pressures change in opposite directions during respiration)<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Concordance (pressures rising and falling together) is a feature of restrictive cardiomyopathy, where the primary issue is myocardial stiffness, not a fixed total volume.\">B. Complete respiratory concordance between RV and LV systolic pressures<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"A difference of &gt; 5 mmHg between LVEDP and RVEDP favors restrictive cardiomyopathy; in constriction, they are typically equalized (within 5 mmHg).\">C. LVEDP exceeding RVEDP by more than 10 mmHg<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Pulmonary artery systolic pressures &gt; 50 mmHg strongly favor restrictive cardiomyopathy.\">D. Severe pulmonary hypertension with PA systolic pressures &gt; 60 mmHg<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm md:text-base leading-relaxed\"><\/div>\n    <\/div>\n\n    <!-- Q8 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q8<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          An asymptomatic 28-year-old male with Ebstein anomaly undergoes routine follow-up. According to ACHD guidelines, which of the following is a Class I indication for surgical intervention (tricuspid valve repair\/replacement)?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Isolated WPW without heart failure or severe TR is managed with catheter ablation, not open surgery.\">A. Development of asymptomatic Wolff-Parkinson-White (WPW) pre-excitation on ECG<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"In Ebstein anomaly, objective evidence of progressive right ventricular enlargement or dysfunction, even in asymptomatic patients with severe TR, is a Class I indication for surgery to prevent irreversible RV failure.\">B. Objective evidence of progressive right ventricular enlargement or decline in right ventricular systolic function<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Mild TR without chamber dilation does not warrant prophylactic surgery.\">C. Presence of mild tricuspid regurgitation with normal RV volumes<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"A small PFO without right-to-left shunting or systemic desaturation does not independently necessitate open heart surgery.\">D. Discovery of a small patent foramen ovale (PFO) without systemic desaturation<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm md:text-base leading-relaxed\"><\/div>\n    <\/div>\n\n    <!-- Q9 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q9<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          A patient presenting with acute chest pain is found to have deep, symmetrical T-wave inversions in leads V2 and V3 while currently pain-free. What anatomical lesion does this Wellens syndrome pattern predict?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"LCx lesions typically present in lateral leads (I, aVL, V5, V6) or as isolated posterior infarctions (tall R waves in V1-V2).\">A. Critical stenosis of the proximal left circumflex artery (LCx)<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"RCA lesions typically manifest in inferior leads (II, III, aVF).\">B. Critical stenosis of the proximal right coronary artery (RCA)<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"Wellens syndrome (biphasic or deeply inverted T waves in V2-V3 during a pain-free state) is highly specific for a critical, highly unstable proximal left anterior descending (LAD) artery stenosis, warning of impending extensive anterior STEMI.\">C. Critical stenosis of the proximal left anterior descending artery (LAD)<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Left main critical stenosis typically presents with widespread ST depression and ST elevation in aVR.\">D. Complete occlusion of the left main coronary artery<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm md:text-base leading-relaxed\"><\/div>\n    <\/div>\n\n    <!-- Q10 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q10<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          During pre-procedural CT planning for Transcatheter Aortic Valve Replacement (TAVR), which anatomical finding places the patient at the highest risk for acute coronary obstruction during valve deployment?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"Coronary obstruction during TAVR is a catastrophic complication most likely to occur when the coronary ostia are very low (&lt; 10-12 mm from the annulus) combined with narrow, shallow sinuses of Valsalva (&lt; 30 mm).\">A. Low coronary ostial height (&lt; 10 mm) and narrow sinuses of Valsalva<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"A heavily calcified left ventricular outflow tract increases the risk of annular rupture and paravalvular leak, not specifically coronary obstruction.\">B. Massive calcification extending deep into the anterior mitral leaflet<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"A large aortic annulus increases the risk of paravalvular leak or device embolization, not coronary obstruction.\">C. A very large aortic annulus diameter (&gt; 30 mm)<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"High coronary ostia (&gt; 15 mm) provide a wide safety margin against obstruction.\">D. High coronary ostial height (&gt; 15 mm) and a dilated ascending aorta<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm md:text-base leading-relaxed\"><\/div>\n    <\/div>\n\n    <!-- Q11 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q11<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          Which of the following echocardiographic criteria indicates severe, primary mitral regurgitation?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"An EROA of 0.20 cm2 denotes moderate MR.\">A. Vena contracta width of 0.3 cm and Effective Regurgitant Orifice Area (EROA) of 0.20 cm&sup2;<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Reversal of systolic flow in the hepatic veins indicates severe tricuspid regurgitation, not mitral.\">B. Reversal of systolic flow in the hepatic veins<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"By ASE guidelines, severe primary mitral regurgitation is defined by an EROA &gt;= 0.40 cm&sup2;, a regurgitant volume &gt;= 60 mL, a vena contracta width &gt;= 0.7 cm, and systolic flow reversal in the pulmonary veins.\">C. Vena contracta width &gt;= 0.7 cm, EROA &gt;= 0.40 cm&sup2;, and systolic flow reversal in the pulmonary veins<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"A regurgitant fraction of 30% indicates mild-to-moderate MR; severe MR requires a regurgitant fraction &gt;= 50%.\">D. Regurgitant volume of 30 mL and regurgitant fraction of 30%<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm md:text-base leading-relaxed\"><\/div>\n    <\/div>\n\n    <!-- Q12 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q12<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          A patient undergoing treatment for metastatic melanoma with the immune checkpoint inhibitor (ICI) ipilimumab\/nivolumab presents with new-onset high-degree AV block and significantly elevated troponins. What is the most crucial first step in management?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"While angiography may be needed to rule out ACS, ICI myocarditis requires immediate immunomodulation. Delaying steroids for a cath in highly suspected ICI myocarditis can be fatal.\">A. Proceed immediately to invasive coronary angiography to rule out acute coronary syndrome<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"Immune checkpoint inhibitor (ICI) myocarditis is a fulminant, potentially fatal complication characterized by T-cell infiltration. Immediate cessation of the ICI and initiation of high-dose intravenous corticosteroids (methylprednisolone) is the critical first-line therapy.\">B. Immediately hold the immune checkpoint inhibitor and initiate high-dose intravenous corticosteroids<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Anticoagulation does not address the underlying T-cell mediated autoimmune destruction.\">C. Initiate intravenous unfractionated heparin for presumed microvascular thrombosis<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Continuing the offending drug is absolutely contraindicated.\">D. Continue the ICI but add oral colchicine and ibuprofen<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm md:text-base leading-relaxed\"><\/div>\n    <\/div>\n\n    <!-- Q13 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q13<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          What is the mechanism of action of vericiguat, a drug approved for patients with high-risk heart failure with reduced ejection fraction following a recent hospitalization?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"This describes ARNIs like sacubitril.\">A. It inhibits neprilysin, preventing the breakdown of natriuretic peptides.<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"Vericiguat is a direct stimulator of soluble guanylate cyclase (sGC), enhancing the cGMP pathway independently of nitric oxide (NO) levels, thereby promoting vasodilation and reducing ventricular remodeling.\">B. It directly stimulates soluble guanylate cyclase (sGC), increasing intracellular cGMP independently of nitric oxide.<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"This describes SGLT2 inhibitors.\">C. It inhibits the sodium-glucose cotransporter-2 in the proximal renal tubule.<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"This describes funny channel (If) inhibitors like ivabradine.\">D. It inhibits the funny current (If) in the sinoatrial node.<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm md:text-base leading-relaxed\"><\/div>\n    <\/div>\n\n    <!-- Q14 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q14<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          An ECG demonstrates wide-complex tachycardia at 160 bpm with a Left Bundle Branch Block (LBBB) morphology and an inferior axis (positive QRS in leads II, III, aVF). What is the most likely origin of this ventricular tachycardia?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Fascicular VT typically has an RBBB morphology and a superior or rightward axis.\">A. Left posterior fascicle (Fascicular VT)<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"A VT originating from the Right Ventricular Outflow Tract (RVOT) classically presents with an LBBB pattern (because it starts in the RV and moves left) and an inferior axis (because it starts high in the outflow tract and moves down).\">B. Right ventricular outflow tract (RVOT)<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"LVOT VT typically has an LBBB morphology but a superior axis or precordial transition differences.\">C. Left ventricular apex<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Coronary sinus origin VTs often have atypical RBBB or LBBB patterns but with a superior axis.\">D. Coronary sinus ostium<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm md:text-base leading-relaxed\"><\/div>\n    <\/div>\n\n    <!-- Q15 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q15<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          A patient presenting with acute chest pain has an ECG showing horizontal ST-segment depression in leads V1 to V3, prominent R waves in V1-V2, and upright T waves. What is the most appropriate next diagnostic step to confirm the suspected diagnosis?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"These findings (ST depression V1-V3, tall R, upright T) are the reciprocal changes of an acute posterior STEMI. The next step is to place posterior leads (V7-V9) to confirm ST elevation (&gt;= 0.5 mm) indicating a posterior myocardial infarction.\">A. Apply posterior ECG leads (V7, V8, V9) to check for ST-segment elevation<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Right-sided leads are for RV infarction (usually seen with inferior STEMI), not isolated posterior STEMI.\">B. Apply right-sided ECG leads (V3R, V4R) to check for right ventricular infarction<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Wait-and-see approaches are inappropriate for potential STEMI equivalents.\">C. Wait 6 hours and draw a serum troponin level before further intervention<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"While echo can show wall motion abnormalities, a simple posterior ECG immediately confirms a STEMI requiring immediate cath activation.\">D. Perform an urgent transesophageal echocardiogram to rule out aortic dissection<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm md:text-base leading-relaxed\"><\/div>\n    <\/div>\n\n    <!-- Q16 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q16<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          Which rare genetic disorder should be highly suspected in a young male presenting with unexplained concentric left ventricular hypertrophy, neuropathic pain (acroparesthesias), angiokeratomas, and proteinuria?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Danon disease causes extreme LVH and WPW pre-excitation, but lacks angiokeratomas and specific acroparesthesias.\">A. Danon Disease<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Pompe disease typically presents in infancy with profound hypotonia and massive cardiomegaly.\">B. Pompe Disease (Glycogen Storage Disease Type II)<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"Fabry disease is an X-linked lysosomal storage disorder caused by alpha-galactosidase A deficiency. The classic tetrad includes hypertrophic cardiomyopathy, neuropathic pain, skin angiokeratomas, and renal dysfunction.\">C. Fabry Disease<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Hemochromatosis causes dilated cardiomyopathy and skin bronzing, not concentric LVH with angiokeratomas.\">D. Hemochromatosis<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm md:text-base leading-relaxed\"><\/div>\n    <\/div>\n\n    <!-- Q17 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q17<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          During cardiac tamponade, what is the pathophysiologic mechanism responsible for &#8220;pulsus paradoxus&#8221; (an abnormally large &gt; 10 mmHg drop in systolic blood pressure during inspiration)?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"In tamponade, total cardiac volume is fixed. Inspiration increases venous return to the RV, causing the free wall to expand outward and the septum to bow severely into the LV. This abruptly decreases LV end-diastolic volume, stroke volume, and systolic BP.\">A. Enhanced ventricular interdependence: increased right ventricular filling during inspiration causes the septum to bow into the left ventricle, reducing left ventricular stroke volume.<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Reflex vagal tone during expiration causes sinus arrhythmia, not pulsus paradoxus.\">B. Reflex excessive vagal tone during expiration leading to profound bradycardia.<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Right heart failure decreases LV filling chronically, but pulsus paradoxus relies on the dynamic, breath-to-breath septal shifting caused by a fixed pericardial space.\">C. Isolated failure of the right ventricle leading to permanently fixed low cardiac output.<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Dynamic LVOT obstruction causes a bisferiens pulse or Brockenbrough-Braunwald sign, not pulsus paradoxus.\">D. Dynamic obstruction of the left ventricular outflow tract during inspiration.<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm md:text-base leading-relaxed\"><\/div>\n    <\/div>\n\n    <!-- Q18 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q18<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          Which specific side effect is uniquely associated with ticagrelor compared to other P2Y12 inhibitors (like clopidogrel or prasugrel), leading to discontinuation in up to 15% of patients?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"TTP is a rare complication historically associated with ticlopidine and clopidogrel.\">A. Thrombotic thrombocytopenic purpura (TTP)<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Gingival hyperplasia is associated with calcium channel blockers or phenytoin.\">B. Severe gingival hyperplasia<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"Ticagrelor inhibits cellular adenosine uptake, leading to increased plasma adenosine levels. This frequently causes self-limiting dyspnea (shortness of breath without heart failure) and occasionally ventricular pauses\/bradycardia.\">C. Dyspnea and ventricular pauses (bradycardia)<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Lupus-like syndrome is associated with procainamide or hydralazine.\">D. Drug-induced lupus erythematosus<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm md:text-base leading-relaxed\"><\/div>\n    <\/div>\n\n    <!-- Q19 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q19<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          Based on the results of the EMPEROR-Preserved and DELIVER trials, which drug class has received a Class 2a recommendation for treating patients with Heart Failure with Preserved Ejection Fraction (HFpEF)?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Neprilysin inhibitors (sacubitril\/valsartan) showed borderline benefit in PARAGON-HF but SGLT2 inhibitors have more robust, definitive trial data in pure HFpEF.\">A. Neprilysin inhibitors (ARNIs)<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"SGLT2 inhibitors (empagliflozin and dapagliflozin) are the first class of medications to definitively show a reduction in heart failure hospitalizations and cardiovascular death in patients with HFpEF.\">B. Sodium-glucose cotransporter 2 (SGLT2) inhibitors<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Beta-blockers have not shown mortality or morbidity benefits in HFpEF and are only used for symptom\/rate control.\">C. Beta-blockers<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Ivabradine is indicated for HFrEF with sinus tachycardia, not routinely for HFpEF.\">D. Sinus node If channel inhibitors (Ivabradine)<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm md:text-base leading-relaxed\"><\/div>\n    <\/div>\n\n    <!-- Q20 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q20<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          Which genetic mutation is responsible for approximately 20-30% of all confirmed cases of Brugada syndrome?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"KCNQ1 mutations cause Long QT Syndrome Type 1, not Brugada.\">A. KCNQ1 (potassium channel)<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"MYH7 is a classic sarcomeric mutation causing Hypertrophic Cardiomyopathy.\">B. MYH7 (beta-myosin heavy chain)<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"Loss-of-function mutations in the SCN5A gene, which encodes the alpha subunit of the cardiac sodium channel (Nav1.5), are the most common genetic cause of Brugada syndrome.\">C. SCN5A (cardiac sodium channel)<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"RYR2 mutations are responsible for Catecholaminergic Polymorphic Ventricular Tachycardia (CPVT).\">D. RYR2 (ryanodine receptor)<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm md:text-base leading-relaxed\"><\/div>\n    <\/div>\n\n    <!-- Q21 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q21<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          During a percutaneous coronary intervention (PCI), a high-pressure balloon inflation results in an Ellis Grade III coronary artery perforation with rapid extravasation into the pericardium. What is the most definitive immediate interventional treatment?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"IV fluids and pressors support hemodynamics but do not seal the bleeding artery.\">A. Aggressive administration of intravenous fluids and vasopressors<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Protamine may be needed, but systemic reversal alone will not stop a large Grade III structural perforation without mechanical sealing.\">B. Immediate systemic administration of protamine sulfate to reverse heparin<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"An Ellis Grade III perforation is a life-threatening emergency. The immediate interventional step is prolonged balloon tamponade, followed by the deployment of a polytetrafluoroethylene (PTFE) covered stent to permanently seal the rupture.\">C. Prolonged balloon tamponade followed by deployment of a PTFE-covered stent<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Bioresorbable scaffolds provide no immediate hemostatic sealing properties.\">D. Deployment of a bioresorbable vascular scaffold<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm md:text-base leading-relaxed\"><\/div>\n    <\/div>\n\n    <!-- Q22 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q22<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          Which congenital heart defect is most frequently associated with the development of a &#8216;parachute mitral valve&#8217; and subaortic stenosis as part of Shone&#8217;s complex?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"Shone's complex is a congenital syndrome consisting of multiple left-sided obstructive lesions: supravalvular mitral ring, parachute mitral valve, subaortic stenosis, and coarctation of the aorta.\">A. Coarctation of the aorta<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Ebstein anomaly is a right-sided tricuspid lesion, not associated with Shone's left-sided obstructions.\">B. Ebstein anomaly<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Anomalous pulmonary venous return does not typically present with sequential left heart obstructive lesions.\">C. Total anomalous pulmonary venous return<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Tetralogy of Fallot involves right-sided outflow tract obstruction and VSD, not left-sided parachute valves.\">D. Tetralogy of Fallot<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm md:text-base leading-relaxed\"><\/div>\n    <\/div>\n\n    <!-- Q23 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q23<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          In the management of infective endocarditis, what is the most common indication for urgent or emergent surgical valve replacement?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"While persistent fever is concerning, it alone is not an absolute indication for emergency surgery compared to hemodynamic collapse.\">A. Persistent fever after 48 hours of appropriate antibiotics<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"A vegetation &gt; 10 mm increases embolic risk, but surgery for size alone is typically elective\/urgent, not the most common reason for emergent intervention.\">B. The presence of a vegetation larger than 10 mm on the mitral valve<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"Heart failure due to acute severe valvular dysfunction (e.g., leaflet perforation or chordal rupture) is the most common and compelling indication for emergent\/urgent surgery in infective endocarditis.\">C. Development of new-onset heart failure due to severe acute valvular regurgitation<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Splinter hemorrhages are minor embolic phenomena and do not require surgery.\">D. Appearance of multiple new splinter hemorrhages and Osler nodes<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm md:text-base leading-relaxed\"><\/div>\n    <\/div>\n\n    <!-- Q24 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q24<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          Which parameter is measured by the CardioMEMS device, a wireless implantable sensor used to monitor patients with advanced heart failure and prevent hospitalizations?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Mixed venous oxygen saturation is measured via a Swan-Ganz catheter, not a CardioMEMS implant.\">A. Continuous mixed venous oxygen saturation<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Left atrial pressure is estimated, but the device physically resides in the pulmonary artery.\">B. Direct continuous left atrial pressure<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"The CardioMEMS device is implanted in a distal branch of the pulmonary artery to measure pulmonary artery pressures. Rises in PA diastolic pressure allow clinicians to adjust diuretics days before clinical congestion occurs.\">C. Pulmonary artery pressure (systolic, diastolic, and mean)<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"Continuous cardiac output requires invasive thermodilution or Fick measurements, which CardioMEMS does not independently do.\">D. Continuous thermodilution cardiac output<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm md:text-base leading-relaxed\"><\/div>\n    <\/div>\n\n    <!-- Q25 -->\n    <div class=\"quiz-card bg-slate-900\/60 border border-solid border-slate-800 rounded-2xl p-5 md:p-6 shadow-lg transition-all duration-300\" data-answered=\"false\">\n      <div class=\"flex items-start gap-3 mb-4\">\n        <span class=\"bg-blue-950 text-cyan-300 font-extrabold px-3 py-1.5 rounded-lg text-sm border border-solid border-blue-500\/30\">Q25<\/span>\n        <h3 class=\"text-lg md:text-xl font-bold text-slate-100 m-0 leading-snug\">\n          A patient with an acute coronary syndrome is treated with bivalirudin during primary PCI. What is the mechanism of action of this anticoagulant?\n        <\/h3>\n      <\/div>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-4\">\n        <button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"This describes fondaparinux and low-molecular-weight heparins.\">A. It is an indirect inhibitor of Factor Xa that requires antithrombin for its action.<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"This describes unfractionated heparin.\">B. It binds to antithrombin, accelerating its inhibition of both thrombin and Factor Xa.<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"true\" data-explanation=\"Bivalirudin is a synthetic, reversible direct thrombin inhibitor (DTI). It binds directly to both the catalytic site and anion-binding exosite of thrombin without requiring antithrombin.\">C. It is a direct thrombin inhibitor that binds reversibly to the catalytic site and anion-binding exosite of thrombin.<\/button><button type=\"button\" class=\"opt-btn text-left p-4 rounded-xl border-2 border-solid border-slate-800 bg-slate-950 hover:bg-slate-900 transition-all text-sm md:text-base font-semibold text-slate-300 cursor-pointer\" data-correct=\"false\" data-explanation=\"This describes glycoprotein IIb\/IIIa inhibitors (e.g., abciximab, tirofiban).\">D. 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