Interactive Cardiology MCQs 29: Cardiomyopathy - All About Cardiovascular System and Disorders

Q1

In patients with Hypertrophic Obstructive Cardiomyopathy (HOCM), dynamic left ventricular outflow tract (LVOT) obstruction is primarily driven by hypertrophy of the basal septum and which accompanying valvular phenomenon?

Q2

Familial Hypertrophic Cardiomyopathy is most commonly inherited in an autosomal dominant pattern. Mutations in which two sarcomeric genes account for the vast majority of genotyped cases?

Q3

On an echocardiogram, a patient with heart failure with preserved ejection fraction (HFpEF) shows severe concentric left ventricular hypertrophy. Which specific global longitudinal strain (GLS) pattern is a highly sensitive and specific hallmark for Cardiac Amyloidosis?

Q4

A 28-year-old male from South America presents with heart failure, right bundle branch block, and a left anterior fascicular block. Echocardiography reveals a distinct apical aneurysm of the left ventricle with a relatively normal basal function. What is the most likely infectious etiology of his cardiomyopathy?

Q5

In Arrhythmogenic Right Ventricular Cardiomyopathy (ARVC), what is the classic diagnostic finding often seen on a 12-lead ECG in leads V1-V3?

Q6

Which of the following classes of pharmacological agents is strictly CONTRAINDICATED in patients with symptomatic Hypertrophic Obstructive Cardiomyopathy (HOCM) as it can acutely worsen the LVOT gradient?

Q7

Mavacamten is a novel, first-in-class pharmacological agent approved for the treatment of symptomatic obstructive Hypertrophic Cardiomyopathy. What is its exact molecular mechanism of action?

Q8

Cardiac MRI (CMR) is the gold standard for non-invasive tissue characterization in cardiomyopathies. In Cardiac Sarcoidosis, what is the most typical pattern of Late Gadolinium Enhancement (LGE)?

Q9

A 22-year-old male presents with severe, progressive hypertrophic cardiomyopathy. His ECG shows extreme voltage and a short PR interval with a delta wave (WPW pattern). He also has cognitive impairment. Genetic testing reveals a mutation in the LAMP2 gene. What is the diagnosis?

Q10

Differentiating Restrictive Cardiomyopathy (RCM) from Constrictive Pericarditis (CP) can be difficult. During invasive hemodynamic catheterization, how do the Left Ventricular (LV) and Right Ventricular (RV) systolic pressures respond to respiration in Constrictive Pericarditis versus Restrictive Cardiomyopathy?

Q11

A patient undergoing non-invasive diagnostic evaluation for suspected Cardiac Amyloidosis receives a Technetium-99m Pyrophosphate (Tc-99m PYP) scan. The scan shows ‘Grade 3’ myocardial uptake (myocardial uptake is significantly greater than rib uptake). What does this specific finding strongly indicate?

Q12

A patient develops severe heart failure during the final month of pregnancy. Based on recent pathophysiological insights implicating oxidative stress and the cleavage of prolactin into an anti-angiogenic 16-kDa fragment, which specialized therapeutic agent is sometimes incorporated into the treatment of Peripartum Cardiomyopathy?

Q13

Anthracycline-induced cardiotoxicity (e.g., from Doxorubicin chemotherapy) differs fundamentally from Trastuzumab-induced cardiotoxicity. Which statement accurately describes the clinical and cellular profile of Anthracycline toxicity?

Q14

Left Ventricular Non-Compaction (LVNC) is characterized by a “spongy” myocardium. Echocardiographic diagnosis (Jenni Criteria) relies on measuring the ratio of the non-compacted (trabeculated) layer to the compacted (solid) layer. What ratio, measured at end-systole, confirms the diagnosis?

Q15

In patients with Dilated Cardiomyopathy (DCM), guideline-directed medical therapy (GDMT) focuses on neurohormonal blockade. Which of the following is NOT a pillar of standard GDMT proven to reduce mortality in HFrEF?

Q16

Hemochromatosis causes a toxic accumulation of iron in the myocardium. Which of the following statements regarding Hemochromatosis-induced cardiomyopathy is clinically accurate?

Q17

A patient with a history of asthma and marked peripheral eosinophilia presents with restrictive cardiomyopathy and severe thickening of the endocardium in both apices, complicated by mural thrombi. What is the diagnosis?

Q18

In patients diagnosed with Hypertrophic Cardiomyopathy (HCM), several major clinical risk factors are evaluated to determine the necessity of prophylactic Implantable Cardioverter-Defibrillator (ICD) placement. Which of the following is considered a major independent risk factor for Sudden Cardiac Death?

Q19

Duchenne Muscular Dystrophy (DMD) invariably involves the heart, eventually leading to a severe dilated cardiomyopathy. On cardiac MRI or autopsy, where does the myocardial fibrosis in DMD characteristically begin?

Q20

Takotsubo Cardiomyopathy (Stress-Induced Cardiomyopathy) mimics an acute myocardial infarction but involves transient regional wall motion abnormalities. Which pathophysiological mechanism is most widely accepted as the primary trigger?

Q21

In patients with advanced Dilated Cardiomyopathy and Left Bundle Branch Block (LBBB), Cardiac Resynchronization Therapy (CRT) is indicated. What is the primary hemodynamic goal achieved by biventricular pacing in this population?

Q22

Alcoholic Cardiomyopathy represents a toxic form of dilated cardiomyopathy. If a patient with severe alcoholic cardiomyopathy strictly and permanently abstains from all alcohol consumption, what is the typical expected clinical trajectory?

Q23

Which specialized echocardiographic modality is essential for accurately identifying and measuring the dynamic LVOT gradient in Hypertrophic Obstructive Cardiomyopathy, especially when provoked by a Valsalva maneuver?

Q24

Endocardial Fibroelastosis (EFE) is a rare, severe cause of restrictive cardiomyopathy seen almost exclusively in which specific patient demographic?

Q25

In Arrhythmogenic Right Ventricular Cardiomyopathy (ARVC), the pathophysiological hallmark is the progressive replacement of right ventricular myocardium with fibrofatty tissue. This disease is fundamentally caused by genetic mutations affecting which critical cellular structure?

Interactive Cardiology MCQs #29

In patients with Hypertrophic Obstructive Cardiomyopathy (HOCM), dynamic left ventricular outflow tract (LVOT) obstruction is primarily driven by hypertrophy of the basal septum and which accompanying valvular phenomenon?

Familial Hypertrophic Cardiomyopathy is most commonly inherited in an autosomal dominant pattern. Mutations in which two sarcomeric genes account for the vast majority of genotyped cases?

On an echocardiogram, a patient with heart failure with preserved ejection fraction (HFpEF) shows severe concentric left ventricular hypertrophy. Which specific global longitudinal strain (GLS) pattern is a highly sensitive and specific hallmark for Cardiac Amyloidosis?

In Arrhythmogenic Right Ventricular Cardiomyopathy (ARVC), what is the classic diagnostic finding often seen on a 12-lead ECG in leads V1-V3?

Which of the following classes of pharmacological agents is strictly CONTRAINDICATED in patients with symptomatic Hypertrophic Obstructive Cardiomyopathy (HOCM) as it can acutely worsen the LVOT gradient?

Mavacamten is a novel, first-in-class pharmacological agent approved for the treatment of symptomatic obstructive Hypertrophic Cardiomyopathy. What is its exact molecular mechanism of action?

Cardiac MRI (CMR) is the gold standard for non-invasive tissue characterization in cardiomyopathies. In Cardiac Sarcoidosis, what is the most typical pattern of Late Gadolinium Enhancement (LGE)?

A 22-year-old male presents with severe, progressive hypertrophic cardiomyopathy. His ECG shows extreme voltage and a short PR interval with a delta wave (WPW pattern). He also has cognitive impairment. Genetic testing reveals a mutation in the LAMP2 gene. What is the diagnosis?

Anthracycline-induced cardiotoxicity (e.g., from Doxorubicin chemotherapy) differs fundamentally from Trastuzumab-induced cardiotoxicity. Which statement accurately describes the clinical and cellular profile of Anthracycline toxicity?

Left Ventricular Non-Compaction (LVNC) is characterized by a “spongy” myocardium. Echocardiographic diagnosis (Jenni Criteria) relies on measuring the ratio of the non-compacted (trabeculated) layer to the compacted (solid) layer. What ratio, measured at end-systole, confirms the diagnosis?

In patients with Dilated Cardiomyopathy (DCM), guideline-directed medical therapy (GDMT) focuses on neurohormonal blockade. Which of the following is NOT a pillar of standard GDMT proven to reduce mortality in HFrEF?

Hemochromatosis causes a toxic accumulation of iron in the myocardium. Which of the following statements regarding Hemochromatosis-induced cardiomyopathy is clinically accurate?

A patient with a history of asthma and marked peripheral eosinophilia presents with restrictive cardiomyopathy and severe thickening of the endocardium in both apices, complicated by mural thrombi. What is the diagnosis?

Duchenne Muscular Dystrophy (DMD) invariably involves the heart, eventually leading to a severe dilated cardiomyopathy. On cardiac MRI or autopsy, where does the myocardial fibrosis in DMD characteristically begin?

Takotsubo Cardiomyopathy (Stress-Induced Cardiomyopathy) mimics an acute myocardial infarction but involves transient regional wall motion abnormalities. Which pathophysiological mechanism is most widely accepted as the primary trigger?

In patients with advanced Dilated Cardiomyopathy and Left Bundle Branch Block (LBBB), Cardiac Resynchronization Therapy (CRT) is indicated. What is the primary hemodynamic goal achieved by biventricular pacing in this population?

Alcoholic Cardiomyopathy represents a toxic form of dilated cardiomyopathy. If a patient with severe alcoholic cardiomyopathy strictly and permanently abstains from all alcohol consumption, what is the typical expected clinical trajectory?

Which specialized echocardiographic modality is essential for accurately identifying and measuring the dynamic LVOT gradient in Hypertrophic Obstructive Cardiomyopathy, especially when provoked by a Valsalva maneuver?

Endocardial Fibroelastosis (EFE) is a rare, severe cause of restrictive cardiomyopathy seen almost exclusively in which specific patient demographic?

In Arrhythmogenic Right Ventricular Cardiomyopathy (ARVC), the pathophysiological hallmark is the progressive replacement of right ventricular myocardium with fibrofatty tissue. This disease is fundamentally caused by genetic mutations affecting which critical cellular structure?