A 64-Year-Old Man Dies Suddenly While Playing Tennis

A 64-year-old man dies suddenly while playing tennis.  In the preceding months, he experienced fatigue and some exertional dyspnea.  Autopsy is performed.  The heart examination shows left ventricular septal thickness of 1.6 cm (normal: <1.1) , posterior wall thickness of 1.6 cm (normal: <1.1) , and an internal left ventricular diameter of 3.2 cm (normal: 3.5-5.9) .  No focal myocardial scarring is seen.  Which of the following is the most likely cause of the cardiac findings seen in this individual?

A) Aortic stenosis
B) Dilated cardiomyopathy
C) Mitral regurgitation
D) Obstructive coronary artery disease
E) Rheumatic mitral stenosis

Correct Answer:

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