Heart Failure USMLE Step 1 Practice Question
A 67-year-old man presents with progressive exertional dyspnea and bilateral lower extremity edema. Vital signs show BP 148/92 mmHg, HR 92 bpm, RR 18, temperature 37.2°C, and SpO2 98% on room air. He reports numbness in both feet and easy bruising but denies orthopnea. Recent labs reveal BNP 450 pg/mL and hemoglobin 14.2 g/dL. Echocardiography demonstrates preserved ejection fraction with impaired ventricular filling and biatrial enlargement. Which diagnosis best explains these findings?
Answer choices
- ADilated cardiomyopathy
- BRestrictive cardiomyopathyCorrect answer
- CHeart failure with reduced ejection fraction
- DCardiac tamponade
- EConstrictive pericarditis
- FHypertrophic cardiomyopathy
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