and Answers (Verified) Plus Rationales 2026 Questions and
Answers with Rationale
SECTION 1: FOUNDATIONS OF HEART FAILURE
Question 1
Which of the following is the most common cause of heart failure in developed
countries?
A) Hypertension
B) Coronary artery disease
C) Valvular heart disease
D) Viral myocarditis
Answer: B) Coronary artery disease
Rationale: Coronary artery disease (CAD) is the leading cause of heart failure in developed
countries due to ischemic injury to the myocardium, which impairs cardiac function.
Ischemic cardiomyopathy results from myocardial infarction and chronic ischemia, leading
to ventricular dysfunction .
,Question 2
A patient presents with dyspnea on exertion, orthopnea, and paroxysmal nocturnal
dyspnea. These symptoms are most consistent with:
A) Right-sided heart failure
B) Left-sided heart failure
C) High-output heart failure
D) Constrictive pericarditis
Answer: B) Left-sided heart failure
Rationale: Left-sided heart failure leads to pulmonary congestion as fluid backs up into the
lungs. This causes dyspnea on exertion, orthopnea (dyspnea when lying flat), and
paroxysmal nocturnal dyspnea (sudden awakening with shortness of breath) .
Question 3
Which biomarker is most useful for diagnosing and prognosticating heart failure?
A) Troponin I
B) CK-MB
C) B-type natriuretic peptide (BNP)
D) C-reactive protein
Answer: C) B-type natriuretic peptide (BNP)
Rationale: BNP and NT-proBNP levels correlate with ventricular wall stress and help
diagnose and assess the severity of heart failure. Elevated levels indicate myocardial
stretch and are used for both diagnosis and prognostication. BNP levels also guide
treatment response .
,Question 4
A patient with heart failure has low blood pressure and signs of poor perfusion. Which
medication class is appropriate?
A) ACE inhibitors
B) Beta-blockers
C) Inotropes (e.g., dobutamine, milrinone)
D) ARBs
Answer: C) Inotropes (e.g., dobutamine, milrinone)
Rationale: Inotropes increase cardiac contractility and support perfusion in patients with
cardiogenic shock or low-output states. They are used when blood pressure is low and
perfusion is inadequate despite other therapies .
SECTION 2: CLASSIFICATION AND STAGING
Question 5
A 47-year-old patient has an LVEF of 45% following an acute myocardial infarction but
reports no symptoms of heart failure. According to the AHA/ACC staging system, this
patient is at:
A) Stage A
B) Stage B
C) Stage C
D) Stage D
, Answer: B) Stage B
Rationale: Stage B (pre-HF) describes patients who have structural heart disease (SHD) as
demonstrated by an LVEF <50% but do not yet have HF symptoms. Stage A patients are at
risk but have no SHD or symptoms. Stage C patients have SHD and current or previous HF
symptoms .
Question 6
The NYHA functional classification is primarily based on:
A) Ejection fraction
B) BNP levels
C) Patient's symptoms and functional limitation
D) Echocardiographic findings
Answer: C) Patient's symptoms and functional limitation
Rationale: NYHA class I-IV is determined by the degree of symptoms and activity
limitation, not imaging or laboratory values. This classification assesses how much
physical activity a patient can perform before experiencing symptoms .
Question 7
Heart failure with preserved ejection fraction (HFpEF) is characterized by:
A) Systolic dysfunction
B) Diastolic dysfunction