Occasional Palpitations in Medicine / Internal Medicine — 44yo Man | Cardiology | SMLE Q#11862
SMLE Question #11862
Medicine / Internal Medicine
Cardiology
Objective: OBJ-163
Last updated: February 2026
A 44-year-old man has progressive dyspnea on exertion for several months with occasional palpitations. He denies chest pain, syncope, or peripheral edema. Cardiac auscultation reveals a high-pitched, blowing, early diastolic decrescendo murmur best heard at the left upper sternal border that becomes louder with deep inspiration. Which of the following is the most likely cause of this murmur?
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