USMLE Step 2 Quiz: Heart Failure And Cardiomyopathies

What this quiz covers

This quiz focuses on Heart Failure And Cardiomyopathies, giving you a quick way to practice the rules, question types, and explanations that matter most for USMLE Step 2.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

Question 1

1. Cardiac resynchronization therapy evaluation (correct answer)
2. Immediate coronary angiography despite no ischemic symptoms
3. Stop beta-blocker permanently due to low EF
4. Start verapamil for conduction system support
5. Treat with antibiotics for presumed myocarditis

Explanation: This question tests the ability to manage heart failure and cardiomyopathies by applying clinical guidelines and evidence-based practices. Heart failure management requires understanding the type of failure (systolic vs diastolic) and selecting appropriate therapies. In the given scenario, the patient's echocardiogram and symptoms suggest heart failure with reduced ejection fraction (HFrEF) with left bundle branch block (LBBB) and wide QRS complex, which guides the management approach. The correct answer is Choice A because it aligns with ACC/AHA guidelines for treating HFrEF patients with EF ≤35%, NYHA class II-IV symptoms, LBBB, and QRS ≥150 ms, ensuring best patient outcomes through cardiac resynchronization therapy (CRT) evaluation. Choice C is incorrect due to the common misconception that beta-blockers should be avoided in low EF, often seen when students overlook that beta-blockers are a cornerstone of guideline-directed medical therapy (GDMT) for HFrEF to improve survival and symptoms. Teaching strategies include reinforcing the differences between heart failure types, emphasizing the importance of guideline adherence, and practicing the application of evidence-based management in clinical scenarios.

Question 2

1. Daily morning weights and call for rapid gain (correct answer)
2. Avoid weighing to reduce anxiety
3. Increase sodium intake before exercise
4. Drink extra fluids when legs swell
5. Stop all medications if urine output increases

Explanation: This question tests the ability to manage heart failure and cardiomyopathies by applying clinical guidelines and evidence-based practices. Heart failure management requires understanding the type of failure (systolic vs diastolic) and selecting appropriate therapies. In the given scenario, the patient's echocardiogram and symptoms suggest decompensated HFrEF amenable to self-monitoring, which guides the management approach. The correct answer is A because it aligns with ACC/AHA guidelines for patient education on weight monitoring, ensuring best patient outcomes. Choice B is incorrect due to potential discouragement of adherence, often seen when students underestimate the value of simple monitoring tools. Teaching strategies include reinforcing the differences between heart failure types, emphasizing the importance of guideline adherence, and practicing the application of evidence-based management in clinical scenarios.

Question 3

1. Add a thiazide-type diuretic for sequential nephron blockade (correct answer)
2. Stop diuretics and give IV fluids for renal perfusion
3. Start verapamil to improve diastolic filling
4. Begin high-dose beta-blocker titration immediately
5. Switch to oral diuretics and discharge

Explanation: This question tests the ability to manage heart failure and cardiomyopathies by applying clinical guidelines and evidence-based practices. Heart failure management requires understanding the type of failure (systolic vs diastolic) and selecting appropriate therapies. In the given scenario, the patient's echocardiogram and symptoms suggest diuretic-resistant decompensated HFrEF, which guides the management approach. The correct answer is A because it aligns with ACC/AHA guidelines for sequential nephron blockade in refractory edema, ensuring best patient outcomes. Choice B is incorrect due to the risk of worsening congestion, often seen when students overprioritize renal protection without addressing volume status. Teaching strategies include reinforcing the differences between heart failure types, emphasizing the importance of guideline adherence, and practicing the application of evidence-based management in clinical scenarios.

Question 4

1. Serum potassium level (correct answer)
2. Serum amylase level
3. Serum bilirubin level
4. Serum vitamin B12 level
5. Serum uric acid level only

Explanation: This question tests the ability to manage heart failure and cardiomyopathies by applying clinical guidelines and evidence-based practices. Heart failure management requires understanding the type of failure (systolic vs diastolic) and selecting appropriate therapies. In the given scenario, the patient's echocardiogram and symptoms suggest decompensated HFrEF requiring diuresis monitoring, which guides the management approach. The correct answer is A because it aligns with ACC/AHA guidelines for preventing hypokalemia during diuresis, ensuring best patient outcomes. Choice B is incorrect due to irrelevance to diuresis complications, often seen when students monitor unrelated labs. Teaching strategies include reinforcing the differences between heart failure types, emphasizing the importance of guideline adherence, and practicing the application of evidence-based management in clinical scenarios.

Question 5

1. Add dapagliflozin (correct answer)
2. Add verapamil
3. Add ibuprofen
4. Add short-acting nifedipine
5. Add dobutamine as chronic outpatient infusion

Explanation: This question tests the ability to manage heart failure and cardiomyopathies by applying clinical guidelines and evidence-based practices. Heart failure management requires understanding the type of failure (systolic vs diastolic) and selecting appropriate therapies. In the given scenario, the patient's echocardiogram and symptoms suggest stabilized decompensated HFrEF without SGLT2i, which guides the management approach. The correct answer is A because it aligns with ACC/AHA guidelines for adding SGLT2 inhibitors to reduce hospitalizations in HFrEF, ensuring best patient outcomes. Choice B is incorrect due to contraindication in systolic HF, often seen when students select therapies for diastolic HF. Teaching strategies include reinforcing the differences between heart failure types, emphasizing the importance of guideline adherence, and practicing the application of evidence-based management in clinical scenarios.

Question 6

1. Pseudoephedrine (correct answer)
2. Acetaminophen
3. Guaifenesin
4. Saline nasal spray
5. Loratadine

Explanation: This question tests the ability to manage heart failure and cardiomyopathies by applying clinical guidelines and evidence-based practices. Heart failure management requires understanding the type of failure (systolic vs diastolic) and selecting appropriate therapies. In the given scenario, the patient's echocardiogram and symptoms suggest decompensated HFrEF from OTC medication, which guides the management approach. The correct answer is A because it aligns with ACC/AHA guidelines avoiding sympathomimetics in HF, ensuring best patient outcomes. Choice B is incorrect due to lack of association with decompensation, often seen when students fail to identify vasoconstrictor effects. Teaching strategies include reinforcing the differences between heart failure types, emphasizing the importance of guideline adherence, and practicing the application of evidence-based management in clinical scenarios.

Question 7

1. Treat suspected pneumonia while giving IV diuretics (correct answer)
2. Ignore infection because BNP is elevated
3. Stop diuretics until antibiotics are completed
4. Start high-dose beta-blocker escalation immediately
5. Give IV fluids to treat fever-related dehydration

Explanation: This question tests the ability to manage heart failure and cardiomyopathies by applying clinical guidelines and evidence-based practices. Heart failure management requires understanding the type of failure (systolic vs diastolic) and selecting appropriate therapies. In the given scenario, the patient's echocardiogram and symptoms suggest decompensated HFrEF with infection, which guides the management approach. The correct answer is A because it aligns with ACC/AHA guidelines for treating precipitants like infection alongside HF therapy, ensuring best patient outcomes. Choice B is incorrect due to overlooking infection, often seen when students attribute all symptoms to HF alone. Teaching strategies include reinforcing the differences between heart failure types, emphasizing the importance of guideline adherence, and practicing the application of evidence-based management in clinical scenarios.

Question 8

1. Add intravenous nitrates for preload and afterload reduction (correct answer)
2. Start verapamil to slow heart rate
3. Give IV fluids to maintain renal perfusion
4. Begin high-dose digoxin as first-line therapy
5. Stop diuretics and observe overnight only

Explanation: This question tests the ability to manage heart failure and cardiomyopathies by applying clinical guidelines and evidence-based practices. Heart failure management requires understanding the type of failure (systolic vs diastolic) and selecting appropriate therapies. In the given scenario, the patient's echocardiogram and symptoms suggest hypertensive decompensated HFrEF, which guides the management approach. The correct answer is A because it aligns with ACC/AHA guidelines for vasodilators in hypertensive acute HF, ensuring best patient outcomes. Choice B is incorrect due to contraindication in systolic HF, often seen when students confuse rate control with afterload reduction. Teaching strategies include reinforcing the differences between heart failure types, emphasizing the importance of guideline adherence, and practicing the application of evidence-based management in clinical scenarios.

Question 9

1. Spironolactone (correct answer)
2. Furosemide
3. Carvedilol
4. Lisinopril
5. All heart failure medications permanently

Explanation: This question tests the ability to manage heart failure and cardiomyopathies by applying clinical guidelines and evidence-based practices. Heart failure management requires understanding the type of failure (systolic vs diastolic) and selecting appropriate therapies. In the given scenario, the patient's echocardiogram and symptoms suggest decompensated HFrEF with hyperkalemia, which guides the management approach. The correct answer is A because it aligns with ACC/AHA guidelines for holding MRAs in hyperkalemia, ensuring best patient outcomes. Choice E is incorrect due to overgeneralization, often seen when students discontinue all therapies without identifying the culprit. Teaching strategies include reinforcing the differences between heart failure types, emphasizing the importance of guideline adherence, and practicing the application of evidence-based management in clinical scenarios.

Question 10

1. Recommend influenza and pneumococcal vaccination if not up to date (correct answer)
2. Avoid vaccines due to risk of fluid overload
3. Recommend live vaccines only for heart failure patients
4. Delay all vaccines until EF normalizes
5. Vaccines are contraindicated with elevated BNP

Explanation: This question tests the ability to manage heart failure and cardiomyopathies by applying clinical guidelines and evidence-based practices. Heart failure management requires understanding the type of failure (systolic vs diastolic) and selecting appropriate therapies. In the given scenario, the patient's echocardiogram and symptoms suggest stabilized decompensated HFrEF, which guides the management approach. The correct answer is A because it aligns with ACC/AHA guidelines for vaccinations to prevent infections in HF, ensuring best patient outcomes. Choice B is incorrect due to misguided risk assessment, often seen when students invent contraindications without evidence. Teaching strategies include reinforcing the differences between heart failure types, emphasizing the importance of guideline adherence, and practicing the application of evidence-based management in clinical scenarios.

Question 11

1. Start IV diltiazem for rate control
2. Give IV loop diuretic and control rate with beta-blocker carefully (correct answer)
3. Immediate electrical cardioversion without anticoagulation assessment
4. Administer large-volume IV fluids for tachycardia
5. Start verapamil and discharge if symptoms improve

Explanation: This question tests the ability to manage heart failure and cardiomyopathies by applying clinical guidelines and evidence-based practices. Heart failure management requires understanding the type of failure (systolic vs diastolic) and selecting appropriate therapies. In the given scenario, the patient's echocardiogram and symptoms suggest decompensated HFrEF with new atrial fibrillation, which guides the management approach. The correct answer is B because it aligns with ACC/AHA guidelines for treating volume overload and cautious rate control in HFrEF, ensuring best patient outcomes. Choice A is incorrect due to the risk of negative inotropy in systolic dysfunction, often seen when students select calcium channel blockers without considering HF type. Teaching strategies include reinforcing the differences between heart failure types, emphasizing the importance of guideline adherence, and practicing the application of evidence-based management in clinical scenarios.

Question 12

1. Low-sodium diet, medication adherence, and close follow-up (correct answer)
2. Stop diuretics once breathing improves
3. Increase alcohol intake to reduce stress
4. Avoid vaccines due to fluid retention risk
5. Use NSAIDs for edema-related pain control

Explanation: This question tests the ability to manage heart failure and cardiomyopathies by applying clinical guidelines and evidence-based practices. Heart failure management requires understanding the type of failure (systolic vs diastolic) and selecting appropriate therapies. In the given scenario, the patient's echocardiogram and symptoms suggest decompensated HFrEF responsive to treatment, which guides the management approach. The correct answer is A because it aligns with ACC/AHA guidelines for discharge education to prevent readmissions, ensuring best patient outcomes. Choice B is incorrect due to risk of recurrent congestion, often seen when students discontinue therapies prematurely. Teaching strategies include reinforcing the differences between heart failure types, emphasizing the importance of guideline adherence, and practicing the application of evidence-based management in clinical scenarios.

Question 13

1. Noninvasive positive-pressure ventilation and IV diuresis (correct answer)
2. Immediate IV beta-blocker bolus for tachycardia
3. Stop diuretics to prevent worsening creatinine
4. Give isotonic saline to improve preload
5. Start verapamil for afterload reduction

Explanation: This question tests the ability to manage heart failure and cardiomyopathies by applying clinical guidelines and evidence-based practices. Heart failure management requires understanding the type of failure (systolic vs diastolic) and selecting appropriate therapies. In the given scenario, the patient's echocardiogram and symptoms suggest flash pulmonary edema in HFrEF, which guides the management approach. The correct answer is A because it aligns with ACC/AHA guidelines for treating acute pulmonary edema with ventilatory support and diuresis, ensuring best patient outcomes. Choice B is incorrect due to the risk of precipitating cardiogenic shock in decompensated HFrEF, often seen when students overlook contraindications to beta-blockers in acute settings. Teaching strategies include reinforcing the differences between heart failure types, emphasizing the importance of guideline adherence, and practicing the application of evidence-based management in clinical scenarios.

Question 14

1. It rises with ventricular wall stretch from volume overload (correct answer)
2. It reflects myocardial necrosis from acute infarction
3. It is produced only by the liver during congestion
4. It decreases when filling pressures are elevated
5. It is specific for pulmonary embolism severity

Explanation: This question tests the ability to manage heart failure and cardiomyopathies by applying clinical guidelines and evidence-based practices. Heart failure management requires understanding the type of failure (systolic vs diastolic) and selecting appropriate therapies. In the given scenario, the patient's echocardiogram and symptoms suggest decompensated HFrEF with elevated BNP, which guides the management approach. The correct answer is A because it aligns with ACC/AHA guidelines explaining BNP physiology in HF, ensuring best patient outcomes. Choice B is incorrect due to confusion with troponin, often seen when students mix biomarkers for ischemia and congestion. Teaching strategies include reinforcing the differences between heart failure types, emphasizing the importance of guideline adherence, and practicing the application of evidence-based management in clinical scenarios.

Question 15

1. Alcoholic cardiomyopathy
2. Ischemic cardiomyopathy
3. Viral myocarditis (correct answer)
4. Hypertrophic obstructive cardiomyopathy

Explanation: This young, previously healthy patient's presentation of acute-onset heart failure following a recent viral illness is classic for viral myocarditis. Viruses, such as coxsackievirus B and adenovirus, can cause direct myocardial injury and trigger an inflammatory response that leads to myocardial dysfunction and dilated cardiomyopathy. The presentation can be fulminant, leading to cardiogenic shock, or more subacute as seen here. The slight troponin elevation reflects myocardial injury.

Question 16

1. Aortic stenosis
2. Dilated cardiomyopathy
3. Arrhythmogenic right ventricular cardiomyopathy
4. Hypertrophic cardiomyopathy (correct answer)

Explanation: The presentation of syncope during exertion in a young athlete, combined with a family history of sudden death, is highly suggestive of hypertrophic cardiomyopathy (HCM). The physical exam finding of a harsh systolic murmur that increases with the Valsalva maneuver (which decreases preload) is classic for the dynamic left ventricular outflow tract obstruction seen in HCM. HCM is an autosomal dominant genetic disorder and is the most common cause of sudden cardiac death in young athletes.

Question 17

1. Serum B-type natriuretic peptide (BNP) level (correct answer)
2. Right heart catheterization
3. Chest MRI
4. 24-hour Holter monitor

Explanation: In a patient presenting with symptoms suggestive of heart failure (dyspnea, orthopnea, crackles), measuring a natriuretic peptide level (BNP or NT-proBNP) is the recommended initial diagnostic test. These peptides are released from the ventricles in response to increased wall stress. A normal level has a high negative predictive value, making heart failure unlikely. An elevated level strongly supports the diagnosis and indicates the need for further evaluation, typically with an echocardiogram.

Question 18

1. Coronary angiography
2. Transthoracic echocardiogram (correct answer)
3. Cardiac MRI
4. Myocardial perfusion scan

Explanation: A transthoracic echocardiogram is the single most important diagnostic tool in the evaluation of a patient with heart failure. It provides crucial information, including the left ventricular ejection fraction (which classifies heart failure as HFrEF, HFmrEF, or HFpEF), assessment of diastolic function, evaluation of ventricular size and wall thickness, assessment of valvular function, and estimation of pulmonary pressures. This information is essential for both diagnosis and guiding management.

Question 19

1. Exercise stress test
2. Transesophageal echocardiogram
3. Signal-averaged ECG
4. Cardiac MRI with delayed gadolinium enhancement (correct answer)

Explanation: In patients with ischemic cardiomyopathy, it is important to distinguish between myocardium that is irreversibly scarred and myocardium that is hibernating (viable but dysfunctional due to chronic ischemia). Cardiac MRI with delayed gadolinium enhancement is an excellent non-invasive tool for this purpose. Areas of non-viable scar tissue will show late gadolinium enhancement, while viable myocardium will not. The extent of viability can help determine if the patient might benefit from revascularization procedures like CABG.

Question 20

1. Spironolactone (correct answer)
2. Digoxin
3. Amlodipine
4. Hydralazine

Explanation: This patient is on an ACE inhibitor and a beta-blocker but remains symptomatic. The next step in GDMT for HFrEF is to add a mineralocorticoid receptor antagonist (MRA) like spironolactone or eplerenone. MRAs have been shown to provide significant mortality benefit in patients with NYHA class II-IV HFrEF and an LVEF of 35% or less, provided they have normal renal function and potassium levels. His current labs show no contraindications.