USMLE Step 2 - Question 38

A 65 year old female with no prior past medical history presents to her primary care physician with increasing dyspnea on exertion, lower extremity edema, and a 20 pound weight loss in the past 3 months. She denies any chest pains. Her physical examination includes normal breath sounds, an early diastolic sound followed by a II/IV early diastolic murmur, and 1+ lower extremity edema. ECG shows left atrial enlargement. Which of the following is the most likely diagnosis?

A. Mitral valve stenosis

B. Aortic valve regurgitation

C. Left atrial myxoma

D. Tricuspid valve stenosis