A 63-year-old man with long-standing poorly controlled hypertension (BP 168/102 mmHg, HR 88 bpm) presents for routine follow-up. He denies dyspnea or orthopnea. Cardiac examination reveals an S4 gallop. Echocardiography demonstrates concentric left ventricular hypertrophy with preserved ejection fraction (EF 55%) and a small chamber cavity. Serum creatinine is 1.1 mg/dL. He takes only occasional antihypertensive medications. Which of the following best explains these cardiac findings?
- A)Concentric left ventricular hypertrophyGABARITO
- B)Dilated cardiomyopathy
- C)Restrictive cardiomyopathy
- D)Cardiac tamponade
- E)Endocardial cushion defect
Explicação
Concentric left ventricular hypertrophy is correct. Chronic pressure overload from systemic hypertension stimulates parallel sarcomere addition, thickening the ventricular wall and reducing compliance. The resulting stiff ventricle produces an S4 and predispos... Ver explicação completa e trilha adaptativa →