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?
- A)Dilated cardiomyopathy
- B)Restrictive cardiomyopathyGABARITO
- C)Heart failure with reduced ejection fraction
- D)Cardiac tamponade
- E)Constrictive pericarditis
Explicação
Restrictive cardiomyopathy is correct. Preserved systolic function with severe diastolic dysfunction, biatrial enlargement, neuropathy, and easy bruising suggests amyloid infiltration causing a stiff ventricle. Restrictive physiology limits filling without the... Ver explicação completa e trilha adaptativa →