{"id":67942,"date":"2026-10-23T05:58:26","date_gmt":"2026-10-23T00:28:26","guid":{"rendered":"https:\/\/johnsonfrancis.org\/professional\/?p=67942"},"modified":"2026-10-23T07:10:02","modified_gmt":"2026-10-23T01:40:02","slug":"new-series-of-interactive-cardiology-mcqs-7","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/professional\/new-series-of-interactive-cardiology-mcqs-7\/","title":{"rendered":"New Series of Interactive Cardiology MCQs 7"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>Please ignore the questions with incomplete options as they have errors in code!<\/strong><\/p>\n\n\n\n<!-- \n  INSTRUCTIONS FOR WORDPRESS:\n  1. Add a new \"Custom HTML\" block in your WordPress editor.\n  2. Copy everything from line 1 to the end of this file.\n  3. Paste it into the Custom HTML block.\n  4. Preview or Publish the post to see the interactive MCQs in action.\n-->\n\n<script src=\"https:\/\/cdn.tailwindcss.com\"><\/script>\n<script>\n  tailwind.config = {\n    corePlugins: {\n      preflight: false, \/\/ Ensures compatibility with WordPress themes\n    }\n  }\n<\/script>\n\n<div class=\"cardio-quiz-wrapper font-sans bg-slate-950 text-slate-200 p-4 md:p-8 rounded-3xl max-w-4xl mx-auto shadow-2xl relative overflow-hidden my-8 border border-cyan-900\/50\" style=\"box-sizing: border-box;\">\n  \n  <!-- Ambient Dark Medical Theme Glows -->\n  <div class=\"absolute top-0 left-0 w-full h-full pointer-events-none opacity-20 bg-[radial-gradient(ellipse_at_top,_var(--tw-gradient-stops))] from-cyan-600 via-slate-900 to-slate-950\"><\/div>\n  \n  <!-- Header Banner -->\n  <div class=\"relative text-center pb-6 border-b border-cyan-900\/50 mb-8\">\n    <div class=\"inline-block bg-gradient-to-r from-cyan-600 to-blue-700 text-white font-black text-xs md:text-sm px-4 py-1.5 rounded-full uppercase tracking-widest shadow-lg mb-4\">\n      Advanced Clinical Series\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-400 to-blue-400 m-0\">\n      Cardiology MCQs: Part 7\n    <\/h1>\n    <p class=\"text-sm md:text-base text-slate-400 mt-3 max-w-2xl mx-auto font-medium\">\n      Test your advanced knowledge of hemodynamics, complex ECGs, cardiomyopathies, and electrophysiology.\n    <\/p>\n  <\/div>\n\n  <!-- Sticky Live Scoreboard -->\n  <div class=\"sticky top-4 z-40 bg-slate-900\/85 backdrop-blur-xl border border-cyan-800\/60 rounded-2xl p-4 md:p-5 mb-8 shadow-lg shadow-cyan-900\/20 flex flex-wrap items-center justify-between gap-4 transition-all\">\n    <div class=\"flex items-center gap-4\">\n      <div class=\"w-12 h-12 rounded-full bg-cyan-950 flex items-center justify-center border border-cyan-700 shadow-inner text-cyan-400\">\n        <svg class=\"w-6 h-6\" fill=\"none\" stroke=\"currentColor\" viewBox=\"0 0 24 24\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2\" d=\"M13 10V3L4 14h7v7l9-11h-7z\"><\/path><\/svg>\n      <\/div>\n      <div>\n        <div class=\"text-[10px] md:text-xs uppercase font-extrabold tracking-widest text-cyan-500\">Live Score<\/div>\n        <div class=\"text-xl md:text-3xl font-black text-slate-100 flex items-baseline gap-1\">\n          <span id=\"score-correct\">0<\/span>\n          <span class=\"text-slate-500 text-sm md:text-lg font-bold\">\/ 25<\/span>\n        <\/div>\n      <\/div>\n    <\/div>\n    <div class=\"flex items-center gap-3 bg-slate-950\/80 px-4 py-2 rounded-xl border border-slate-800\">\n      <span class=\"text-xs font-bold text-slate-400 uppercase tracking-widest hidden sm:inline\">Progress<\/span>\n      <div class=\"w-24 md:w-32 bg-slate-800 h-2.5 rounded-full overflow-hidden\">\n        <div id=\"progress-bar\" class=\"bg-gradient-to-r from-cyan-500 to-blue-500 h-full w-0 transition-all duration-500 rounded-full\"><\/div>\n      <\/div>\n      <span class=\"text-xs font-bold text-cyan-400\"><span id=\"score-answered\">0<\/span>\/25<\/span>\n    <\/div>\n  <\/div>\n\n  <!-- Quiz Questions Container -->\n  <div class=\"space-y-6 relative\">\n    \n    <!-- QUESTION 1 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">1.<\/span> \n        During right heart catheterization, a &#8216;dip and plateau&#8217; (square root sign) in the ventricular pressure tracing is most characteristic of:\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"false\" data-explanation=\"Cardiac tamponade typically shows equalization of diastolic pressures without the prominent early diastolic dip seen in constrictive physiology.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) Cardiac tamponade<\/button>\n        <button data-correct=\"true\" data-explanation=\"The 'dip and plateau' or square root sign is classic for constrictive pericarditis, representing rapid early diastolic filling (dip) followed by an abrupt halt (plateau) due to a rigid pericardium.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">B) Constrictive pericarditis<\/button>\n        <button data-correct=\"false\" data-explanation=\"Dilated cardiomyopathy usually shows elevated end-diastolic pressures but lacks the rapid early diastolic dip and rigid plateau.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) Dilated cardiomyopathy<\/button>\n        <button data-correct=\"false\" data-explanation=\"Aortic stenosis causes a large systolic pressure gradient, not a diastolic square root sign.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) Severe aortic stenosis<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n    <!-- QUESTION 2 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">2.<\/span> \n        In echocardiography, the &#8216;apical sparing&#8217; pattern of longitudinal strain (a bullseye plot with preserved apical function but severely reduced basal\/mid function) is a hallmark of:\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"false\" data-explanation=\"HOCM typically shows reduced strain in the hypertrophied septum, not a diffuse basal\/mid reduction with apical sparing.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) Hypertrophic cardiomyopathy<\/button>\n        <button data-correct=\"true\" data-explanation=\"Cardiac amyloidosis classically presents with 'apical sparing' on 2D speckle-tracking echocardiography, differentiating it from other causes of left ventricular hypertrophy.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">B) Cardiac amyloidosis<\/button>\n        <button data-correct=\"false\" data-explanation=\"Takotsubo cardiomyopathy is characterized by apical ballooning and akinesis, meaning apical strain would be the most severely reduced.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) Takotsubo cardiomyopathy<\/button>\n        <button data-correct=\"false\" data-explanation=\"Fabry disease causes concentric hypertrophy and reduced global longitudinal strain, but without the classic 'cherry-on-top' apical sparing seen in amyloidosis.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) Fabry disease<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n    <!-- QUESTION 3 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">3.<\/span> \n        Which antiarrhythmic drug exhibits &#8216;reverse use dependence&#8217; (meaning its action potential prolonging effect is greatest at slower heart rates)?\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"false\" data-explanation=\"Flecainide is a Class IC agent that exhibits standard 'use dependence', meaning its sodium channel blocking effect increases at faster heart rates.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) Flecainide<\/button>\n        <button data-correct=\"false\" data-explanation=\"Amiodarone is a complex drug that does not display significant reverse use dependence compared to pure Class III agents.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">B) Amiodarone<\/button>\n        <button data-correct=\"true\" data-explanation=\"Dofetilide (and Sotalol) are Class III antiarrhythmics that exhibit 'reverse use dependence'. Their QT-prolonging effect (blocking IKr) is most pronounced at bradycardic heart rates, increasing the risk of Torsades de Pointes.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) Dofetilide<\/button>\n        <button data-correct=\"false\" data-explanation=\"Lidocaine is a Class IB agent; its effect on sodium channels actually increases in ischemic tissue and at faster heart rates.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) Lidocaine<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n    <!-- QUESTION 4 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">4.<\/span> \n        In typical Atrioventricular Nodal Reentrant Tachycardia (AVNRT), the reentrant circuit utilizes:\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"true\" data-explanation=\"Typical AVNRT (Slow-Fast) uses the slow pathway for anterograde conduction (down to the ventricles) and the fast pathway for retrograde conduction (back up to the atria).\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) Slow pathway anterograde, fast pathway retrograde<\/button>\n        <button data-correct=\"false\" data-explanation=\"Fast pathway anterograde and slow pathway retrograde defines 'Atypical' (Fast-Slow) AVNRT.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">B) Fast pathway anterograde, slow pathway retrograde<\/button>\n        <button data-correct=\"false\" data-explanation=\"Accessory pathways (like the Bundle of Kent) are involved in AVRT (e.g., WPW syndrome), not AVNRT.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) An accessory pathway for anterograde conduction<\/button>\n        <button data-correct=\"false\" data-explanation=\"An accessory pathway used for retrograde conduction is typical of orthodromic AVRT, not AVNRT.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) An accessory pathway for retrograde conduction<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n    <!-- QUESTION 5 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">5.<\/span> \n        What is the specific mechanism of action for PCSK9 inhibitors (e.g., Evolocumab)?\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"false\" data-explanation=\"Inhibiting HMG-CoA reductase is the mechanism of statins.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) Inhibition of HMG-CoA reductase<\/button>\n        <button data-correct=\"false\" data-explanation=\"Ezetimibe works by inhibiting cholesterol absorption at the brush border of the small intestine.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">B) Inhibition of intestinal cholesterol absorption<\/button>\n        <button data-correct=\"true\" data-explanation=\"PCSK9 binds to LDL receptors and promotes their lysosomal degradation. PCSK9 inhibitors prevent this, leading to more LDL receptors on the hepatocyte surface, which dramatically clears LDL from the blood.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) Prevention of LDL receptor degradation<\/button>\n        <button data-correct=\"false\" data-explanation=\"Fibrates lower triglycerides by activating PPAR-alpha, not via PCSK9.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) Activation of PPAR-alpha<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n    <!-- QUESTION 6 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">6.<\/span> \n        In patients with acute anterior myocardial infarction, the appearance of biphasic T waves in leads V2-V3 during a pain-free interval is highly specific for:\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"false\" data-explanation=\"Brugada syndrome presents with coved ST elevation and pseudo-RBBB, not isolated biphasic T waves during post-ischemic states.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) Brugada Syndrome<\/button>\n        <button data-correct=\"true\" data-explanation=\"This describes Wellens' syndrome (Type A). It indicates a critical, highly unstable proximal Left Anterior Descending (LAD) artery stenosis, warning of an impending massive anterior infarction.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">B) Wellens&#8217; Syndrome<\/button>\n        <button data-correct=\"false\" data-explanation=\"De Winter T waves present as tall, prominent, symmetric T waves with upsloping ST depression at the J point, not biphasic T waves.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) De Winter&#8217;s T waves<\/button>\n        <button data-correct=\"false\" data-explanation=\"Left ventricular aneurysm classically presents with persistent ST elevation weeks after an MI, not dynamic biphasic T waves.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) Left ventricular aneurysm<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n    <!-- QUESTION 7 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">7.<\/span> \n        The Austin Flint murmur, associated with severe aortic regurgitation, is functionally created by:\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"false\" data-explanation=\"Rheumatic disease causes organic mitral stenosis. Austin Flint is a functional murmur without structural leaflet fusion.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) Organic rheumatic thickening of the mitral valve<\/button>\n        <button data-correct=\"true\" data-explanation=\"The regurgitant aortic jet impinges upon the anterior leaflet of the mitral valve, restricting its opening and creating a functional, relative mitral stenosis mid-diastolic rumble.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">B) The AR jet impinging on the anterior mitral leaflet<\/button>\n        <button data-correct=\"false\" data-explanation=\"Increased flow across the tricuspid valve causes a right-sided diastolic rumble, not an Austin Flint murmur.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) Increased flow across the tricuspid valve<\/button>\n        <button data-correct=\"false\" data-explanation=\"Aortic root dilation causes the primary blowing diastolic murmur of AR, but the Austin Flint rumble specifically requires interaction with the mitral leaflet.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) Dilation of the aortic root vibrating during diastole<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n    <!-- QUESTION 8 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">8.<\/span> \n        In patients with Tetralogy of Fallot, the primary determinant of the severity of cyanosis and clinical presentation is:\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"false\" data-explanation=\"While the VSD is large and non-restrictive, its size does not dictate the shunt direction; the RVOT obstruction does.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) Size of the ventricular septal defect<\/button>\n        <button data-correct=\"false\" data-explanation=\"The overriding aorta is an anatomical hallmark, but it is the pressure gradient forcing blood into it that determines cyanosis.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">B) Degree of aortic overriding<\/button>\n        <button data-correct=\"true\" data-explanation=\"The degree of right ventricular outflow tract (RVOT) obstruction determines how much deoxygenated blood is forced right-to-left across the VSD into the systemic circulation, driving the severity of cyanosis.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) Degree of right ventricular outflow tract obstruction<\/button>\n        <button data-correct=\"false\" data-explanation=\"RV hypertrophy is a consequence of the RVOT obstruction, not the primary cause of the right-to-left shunting.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) Magnitude of right ventricular hypertrophy<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n    <!-- QUESTION 9 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">9.<\/span> \n        In cardiovascular hemodynamics, the Fick Principle calculates Cardiac Output (CO) using which parameters?\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"true\" data-explanation=\"The Fick equation is: CO = Oxygen Consumption (VO2) \/ (Arterial O2 content - Venous O2 content). It relies on conservation of mass across the pulmonary bed.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) Oxygen consumption and arteriovenous oxygen difference<\/button>\n        <button data-correct=\"false\" data-explanation=\"Thermodilution uses temperature decay curves, not the Fick principle.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">B) Indicator dye concentration over time<\/button>\n        <button data-correct=\"false\" data-explanation=\"Heart rate multiplied by stroke volume is the standard physiologic equation for CO, not the Fick principle.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) Heart rate and stroke volume<\/button>\n        <button data-correct=\"false\" data-explanation=\"Mean arterial pressure divided by systemic vascular resistance calculates Cardiac Output (Ohm's law analogy), but this is not the Fick method.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) Mean arterial pressure and systemic vascular resistance<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n    <!-- QUESTION 10 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">10.<\/span> \n        What is the most common conduction complication following Transcatheter Aortic Valve Replacement (TAVR) that requires intervention?\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"false\" data-explanation=\"Ventricular tachycardia is a rare complication following TAVR.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) Ventricular tachycardia<\/button>\n        <button data-correct=\"false\" data-explanation=\"Atrial fibrillation may occur, but conduction blocks are the most frequent complication specific to the procedure mechanics.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">B) New-onset atrial fibrillation<\/button>\n        <button data-correct=\"true\" data-explanation=\"Because the AV node and left bundle branch sit precariously close to the aortic annulus, expanding a TAVR valve often crushes the conduction system, making high-degree AV block (requiring a pacemaker) the most common complication.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) High-degree AV block requiring a pacemaker<\/button>\n        <button data-correct=\"false\" data-explanation=\"First-degree AV block is common but usually does not require pacing intervention.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) Symptomatic first-degree AV block<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n    <!-- QUESTION 11 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">11.<\/span> \n        In patients with Mitral Valve Prolapse (MVP), performing a rapid squatting maneuver has what effect on the characteristic click and murmur?\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"false\" data-explanation=\"Moving earlier in systole happens with maneuvers that decrease LV volume (like standing or Valsalva).\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) Moves them earlier in systole<\/button>\n        <button data-correct=\"true\" data-explanation=\"Squatting increases venous return (preload) and afterload, enlarging the left ventricular volume. This delays the prolapse of the floppy leaflets, moving the click and murmur LATER in systole (and making the murmur shorter).\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">B) Moves them later in systole<\/button>\n        <button data-correct=\"false\" data-explanation=\"Squatting dynamically changes the timing of MVP murmurs; they do not remain unchanged.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) Timing is unchanged, but intensity increases<\/button>\n        <button data-correct=\"false\" data-explanation=\"Squatting decreases the duration of the MVP murmur, but does not completely obliterate the sound.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) Completely obliterates the murmur<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n    <!-- QUESTION 12 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">12.<\/span> \n        A patient presenting with acute, severe tearing chest pain radiating to the back is found to have a Stanford Type B aortic dissection. Assuming no end-organ ischemia, what is the initial medical therapy of choice?\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"false\" data-explanation=\"Immediate surgical repair is the standard for Type A dissections, whereas uncomplicated Type B is managed medically first.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) Immediate open surgical repair<\/button>\n        <button data-correct=\"true\" data-explanation=\"Intravenous beta-blockers (like esmolol or labetalol) are the cornerstone of therapy to reduce heart rate and dp\/dt (shearing forces on the aortic wall).\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">B) Intravenous beta-blockers (e.g., Esmolol)<\/button>\n        <button data-correct=\"false\" data-explanation=\"Sodium nitroprusside causes reflex tachycardia if given alone, which increases aortic shearing forces (dp\/dt). A beta-blocker MUST be given first.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) Sodium nitroprusside monotherapy<\/button>\n        <button data-correct=\"false\" data-explanation=\"Thrombolytics (like tPA) are strictly contraindicated as they will exacerbate bleeding in the false lumen and cause fatal hemorrhage.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) Intravenous thrombolytics<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n    <!-- QUESTION 13 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">13.<\/span> \n        In patients with isolated native mitral valve stenosis, severity is typically quantified on echocardiography using:\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"false\" data-explanation=\"While peak gradient is measured, it is highly flow-dependent. The mean gradient and valve area are the primary markers of severity.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) Peak transvalvular velocity<\/button>\n        <button data-correct=\"true\" data-explanation=\"Pressure half-time (PHT) evaluates the rate of pressure drop across the mitral valve. In severe stenosis, the hole is tight, so pressure equalizes slowly, yielding a LONG pressure half-time (>= 150 ms is severe).&#8221; class=&#8221;opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300&#8243;>B) Pressure half-time calculation for Valve Area<\/button>\n        <button data-correct=\"false\" data-explanation=\"The proximal isovelocity surface area (PISA) is primarily used to grade the severity of regurgitant lesions (like MR or AR).\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) Proximal Isovelocity Surface Area (PISA)<\/button>\n        <button data-correct=\"false\" data-explanation=\"Vena contracta width is an excellent measure for regurgitation, not stenosis.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) Vena contracta width<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n    <!-- QUESTION 14 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">14.<\/span> \n        Which primary immunosuppressive agent class forms the backbone of therapy in preventing rejection for post-cardiac transplant patients?\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"false\" data-explanation=\"Corticosteroids are used as adjuncts or for acute rejection, but are usually tapered to minimize long-term side effects.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) Corticosteroids<\/button>\n        <button data-correct=\"false\" data-explanation=\"mTOR inhibitors (Sirolimus) are used, especially if patients develop transplant coronary artery vasculopathy, but calcineurin inhibitors are the initial backbone.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">B) mTOR inhibitors (e.g., Sirolimus)<\/button>\n        <button data-correct=\"true\" data-explanation=\"Calcineurin inhibitors (like Tacrolimus or Cyclosporine) inhibit T-cell activation via IL-2 suppression and form the backbone of solid organ transplant maintenance regimens.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) Calcineurin inhibitors (e.g., Tacrolimus)<\/button>\n        <button data-correct=\"false\" data-explanation=\"Purine synthesis inhibitors (Mycophenolate Mofetil) are used as a secondary adjunctive agent alongside calcineurin inhibitors.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) Purine synthesis inhibitors (e.g., Mycophenolate)<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n    <!-- QUESTION 15 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">15.<\/span> \n        What is the specific electrophysiologic effect of hypercalcemia on a standard 12-lead ECG?\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"false\" data-explanation=\"Hypocalcemia, not hypercalcemia, prolongs the action potential plateau, leading to a prolonged QT interval.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) Prolonged QT interval<\/button>\n        <button data-correct=\"true\" data-explanation=\"Hypercalcemia shortens phase 2 (the plateau phase) of the ventricular action potential, resulting in a characteristically short QT interval.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">B) Shortened QT interval<\/button>\n        <button data-correct=\"false\" data-explanation=\"Hyperkalemia, not hypercalcemia, typically leads to widening of the QRS complex.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) Widened QRS complex<\/button>\n        <button data-correct=\"false\" data-explanation=\"Prominent U waves are the hallmark of hypokalemia.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) Prominent U waves<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n    <!-- QUESTION 16 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">16.<\/span> \n        In Brugada Syndrome, which ion channel gene is most frequently mutated?\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"false\" data-explanation=\"KCNQ1 mutations (potassium channels) are associated with Long QT Syndrome Type 1.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) KCNQ1<\/button>\n        <button data-correct=\"false\" data-explanation=\"KCNH2 mutations (potassium channels) are associated with Long QT Syndrome Type 2.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">B) KCNH2<\/button>\n        <button data-correct=\"true\" data-explanation=\"Loss-of-function mutations in the SCN5A gene (encoding the Nav1.5 cardiac sodium channel) are responsible for 20-30% of all cases of Brugada Syndrome.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) SCN5A<\/button>\n        <button data-correct=\"false\" data-explanation=\"RYR2 (Ryanodine receptor) mutations cause Catecholaminergic Polymorphic Ventricular Tachycardia (CPVT).\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) RYR2<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n    <!-- QUESTION 17 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">17.<\/span> \n        Which of the following Late Gadolinium Enhancement (LGE) patterns on Cardiac MRI is most characteristic of acute viral myocarditis?\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"false\" data-explanation=\"Subendocardial LGE following a coronary territory is the classic hallmark of ischemic cardiomyopathy (prior MI).\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) Subendocardial enhancement<\/button>\n        <button data-correct=\"true\" data-explanation=\"Myocarditis classically presents with a non-ischemic LGE pattern, primarily affecting the epicardium or mid-wall, frequently inferolaterally.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">B) Epicardial and\/or mid-wall enhancement<\/button>\n        <button data-correct=\"false\" data-explanation=\"Global diffuse subendocardial enhancement is characteristic of cardiac amyloidosis.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) Global diffuse subendocardial enhancement<\/button>\n        <button data-correct=\"false\" data-explanation=\"Transmural enhancement is indicative of a completed, full-thickness myocardial infarction.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) Transmural enhancement following a vascular territory<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n    <!-- QUESTION 18 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">18.<\/span> \n        A patient with Pulmonary Arterial Hypertension (PAH) is prescribed Bosentan. What is its mechanism of action?\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"false\" data-explanation=\"Sildenafil and Tadalafil are PDE-5 inhibitors used in PAH.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) Phosphodiesterase-5 inhibitor<\/button>\n        <button data-correct=\"true\" data-explanation=\"Bosentan is a dual Endothelin Receptor Antagonist (blocking both ETA and ETB receptors), which prevents endothelin-mediated severe pulmonary vasoconstriction.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">B) Endothelin receptor antagonist<\/button>\n        <button data-correct=\"false\" data-explanation=\"Epoprostenol, Iloprost, and Treprostinil act via the prostacyclin pathway (analogs or agonists).\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) Prostacyclin analog<\/button>\n        <button data-correct=\"false\" data-explanation=\"Riociguat stimulates soluble guanylate cyclase, independently of nitric oxide.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) Soluble guanylate cyclase stimulator<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n    <!-- QUESTION 19 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">19.<\/span> \n        In patients with a single ventricle physiology who have undergone a completed Fontan operation, what is a feared, chronic, life-threatening complication characterized by chronic severe diarrhea and edema?\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"false\" data-explanation=\"Plastic bronchitis (coughing up bronchial casts) is a pulmonary complication of Fontan circulation, but it doesn't cause chronic diarrhea.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) Plastic bronchitis<\/button>\n        <button data-correct=\"true\" data-explanation=\"Protein-Losing Enteropathy (PLE) is a severe complication driven by chronically elevated systemic venous pressures in the Fontan circuit, leading to lymphatic congestion, intestinal protein leakage, hypoalbuminemia, and massive edema.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">B) Protein-losing enteropathy<\/button>\n        <button data-correct=\"false\" data-explanation=\"Eisenmenger syndrome involves pulmonary vascular disease causing shunt reversal, usually in uncorrected large left-to-right shunts.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) Eisenmenger syndrome<\/button>\n        <button data-correct=\"false\" data-explanation=\"Aortopulmonary collaterals can form, but they don't produce the classic triad of diarrhea, edema, and hypoproteinemia seen in PLE.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) Major aortopulmonary collateral arteries (MAPCAs)<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n    <!-- QUESTION 20 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">20.<\/span> \n        In patients with isolated posterior myocardial infarction, what is the classic presentation on standard 12-lead ECG in leads V1 to V3?\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"false\" data-explanation=\"ST elevation and Q waves in V1-V3 define an anteroseptal MI.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) ST segment elevation and pathologic Q waves<\/button>\n        <button data-correct=\"true\" data-explanation=\"Because V1-V3 sit opposite to the posterior wall, an acute posterior STEMI looks inverted on these leads: horizontal ST depression, tall upright T waves, and prominent tall R waves.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">B) ST segment depression, prominent R waves, and upright T waves<\/button>\n        <button data-correct=\"false\" data-explanation=\"Poor R wave progression is often seen with prior anterior MI, not an acute posterior MI.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) Poor R wave progression and symmetric T wave inversion<\/button>\n        <button data-correct=\"false\" data-explanation=\"Coved ST elevation with T wave inversion describes the Brugada pattern, not acute ischemia.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) Coved ST elevation with T wave inversion<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n    <!-- QUESTION 21 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">21.<\/span> \n        Which physical exam finding is the hallmark of severe, fixed aortic stenosis?\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"false\" data-explanation=\"Water-hammer (Corrigan's) pulse is a rapidly rising and falling pulse seen in severe aortic regurgitation.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) Water-hammer pulse<\/button>\n        <button data-correct=\"false\" data-explanation=\"Pulsus bisferiens (a double-peaked systolic pulse) is seen in severe HOCM or combined aortic stenosis\/regurgitation.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">B) Pulsus bisferiens<\/button>\n        <button data-correct=\"true\" data-explanation=\"Pulsus parvus et tardus means the arterial pulse is weak\/small (parvus) and delayed (tardus), classically representing the obstructed, sluggish left ventricular emptying of severe aortic stenosis.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) Pulsus parvus et tardus<\/button>\n        <button data-correct=\"false\" data-explanation=\"Pulsus alternans (alternating strong and weak beats) is a sign of severe left ventricular systolic dysfunction.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) Pulsus alternans<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n    <!-- QUESTION 22 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">22.<\/span> \n        In patients with a permanent ventricular pacemaker (VVI mode), &#8216;Pacemaker Syndrome&#8217; is primarily caused by:\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"false\" data-explanation=\"Lead dislodgement would cause failure to capture or sense, leading to bradycardia, but that is not the physiological basis of Pacemaker Syndrome.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) Ventricular lead dislodgement<\/button>\n        <button data-correct=\"true\" data-explanation=\"Pacemaker syndrome occurs when the ventricles are paced without synchronous atrial contraction. The atria contract against closed AV valves, causing cannon A waves, venous distention, and reduced cardiac output.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">B) Loss of atrioventricular (AV) synchrony<\/button>\n        <button data-correct=\"false\" data-explanation=\"Pacemaker-mediated tachycardia (PMT) requires a dual-chamber device tracking retrograde P waves; VVI devices only have one lead.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) Pacemaker-mediated tachycardia (PMT)<\/button>\n        <button data-correct=\"false\" data-explanation=\"Oversensing of muscular myopotentials causes inappropriate pacing inhibition, not the hemodynamic shifts of Pacemaker syndrome.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) Oversensing of pectoral myopotentials<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n    <!-- QUESTION 23 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">23.<\/span> \n        What severe congenital heart defect is heavily associated with maternal Lithium use during the first trimester?\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"true\" data-explanation=\"Maternal lithium use is a classic pharmacological risk factor for the development of Ebstein anomaly (apical displacement of the tricuspid valve leaflets).\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) Ebstein anomaly<\/button>\n        <button data-correct=\"false\" data-explanation=\"Transposition of the great arteries is associated with maternal diabetes, not specifically lithium.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">B) Transposition of the great arteries<\/button>\n        <button data-correct=\"false\" data-explanation=\"Coarctation is associated with Turner syndrome, not lithium exposure.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) Coarctation of the aorta<\/button>\n        <button data-correct=\"false\" data-explanation=\"PDA is common in premature infants and associated with maternal rubella infection.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) Patent ductus arteriosus<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n    <!-- QUESTION 24 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">24.<\/span> \n        In patients undergoing an acute anterior STEMI, rupture of the ventricular septum typically occurs:\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"false\" data-explanation=\"Immediately at symptom onset is too early; necrosis and macrophage-mediated weakening must occur first.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) Immediately at symptom onset<\/button>\n        <button data-correct=\"true\" data-explanation=\"Mechanical complications of an MI (like ventricular septal rupture or papillary muscle rupture) classically occur 3-5 days post-infarction, driven by macrophage infiltration and tissue weakening.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">B) 3 to 5 days post-infarction<\/button>\n        <button data-correct=\"false\" data-explanation=\"By 2 weeks, granulation tissue has formed, significantly lowering the risk of myocardial rupture.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) 2 to 3 weeks post-infarction<\/button>\n        <button data-correct=\"false\" data-explanation=\"6 months post-MI is when dense, stable scars exist. Aneurysms may form, but acute rupture does not happen here.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) > 6 months post-infarction<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n    <!-- QUESTION 25 -->\n    <div class=\"mcq-card bg-slate-900 border border-slate-800 rounded-2xl p-5 md:p-6 shadow-md transition-all duration-300 hover:border-cyan-800\/50\" data-answered=\"false\">\n      <h3 class=\"text-lg md:text-xl font-bold text-slate-100 mb-5 leading-snug flex gap-3\">\n        <span class=\"text-cyan-500 font-black\">25.<\/span> \n        Tachycardia utilizing a Mahaim fiber typically presents with an ECG showing:\n      <\/h3>\n      <div class=\"grid grid-cols-1 md:grid-cols-2 gap-3 mb-2\">\n        <button data-correct=\"true\" data-explanation=\"Mahaim fibers typically connect the right atrium directly to the right bundle branch (atriofascicular). Tachycardia utilizing this pathway conducts anterogradely down the fiber, activating the right ventricle first, producing a wide QRS with a Left Bundle Branch Block (LBBB) morphology.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">A) Left bundle branch block (LBBB) morphology<\/button>\n        <button data-correct=\"false\" data-explanation=\"RBBB morphology is seen if the left ventricle is activated first (like via a left-sided accessory pathway), not right-sided Mahaim fibers.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">B) Right bundle branch block (RBBB) morphology<\/button>\n        <button data-correct=\"false\" data-explanation=\"Narrow QRS complex tachycardias conduct down the normal AV node, whereas Mahaim tachycardia is antidromic and thus wide-complex.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">C) Narrow QRS complex<\/button>\n        <button data-correct=\"false\" data-explanation=\"Polymorphic ventricular tachycardia (like Torsades) changes axis constantly; Mahaim produces a stable monomorphic wide complex rhythm.\" class=\"opt-btn w-full text-left p-4 rounded-xl border border-slate-700 bg-slate-950 hover:bg-slate-800 hover:border-slate-500 transition-all text-sm md:text-base font-semibold text-slate-300\">D) Polymorphic QRS complex<\/button>\n      <\/div>\n      <div class=\"feedback-box hidden p-4 rounded-xl text-sm leading-relaxed mt-4\"><\/div>\n    <\/div>\n\n  <\/div>\n<\/div>\n\n<script>\n  document.addEventListener('DOMContentLoaded', () => {\n    const cards = document.querySelectorAll('.mcq-card');\n    const scoreCorrectEl = document.getElementById('score-correct');\n    const scoreAnsweredEl = document.getElementById('score-answered');\n    const progressBar = document.getElementById('progress-bar');\n    \n    let correctCount = 0;\n    let answeredCount = 0;\n    const totalQuestions = cards.length;\n\n    cards.forEach(card => {\n      const buttons = card.querySelectorAll('.opt-btn');\n      const feedbackBox = card.querySelector('.feedback-box');\n\n      buttons.forEach(btn => {\n        btn.addEventListener('click', function() {\n          \n          \/\/ 1. 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During right heart catheterization, a &#8216;dip and plateau&#8217; (square root sign) in the ventricular pressure tracing [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":67947,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","footnotes":""},"categories":[9],"tags":[],"class_list":["post-67942","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>New Series of Interactive Cardiology MCQs 7 - All About Cardiovascular System and Disorders<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/johnsonfrancis.org\/professional\/new-series-of-interactive-cardiology-mcqs-7\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"New Series of Interactive Cardiology MCQs 7 - All About Cardiovascular System and Disorders\" \/>\n<meta property=\"og:description\" content=\"Please ignore the questions with incomplete options as they have errors in code! Advanced Clinical Series Cardiology MCQs: Part 7 Test your advanced knowledge of hemodynamics, complex ECGs, cardiomyopathies, and electrophysiology. Live Score 0 \/ 25 Progress 0\/25 1. 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