A 27-year-old woman presents as a new patient to your practice.  She is without chief complaint. She asks to, “get a refill on my birth control pills” , having used combined oral contraceptives for the past 12 years without adverse effects.  Social history reveals she is a nonsmoker, without recreational drug use, drinks approximately 1-2 mixed drinks per week, and runs 2-3 miles 5 days a week with reported excellent activity tolerance. Her health history is generally unremarkable, but with patient report of a “mild heart murmur that was picked up when I was a teenager during a physical I needed so I could run track. I was told not to worry about it.” Physical exam is unremarkable with the exception of a mid-systolic click followed by a grade II mid to late systolic murmur without radiation. The remainder of the cardiac exam is within normal limits. 

These findings most likely represent which type of murmur?

A. Physiologic

B. Aortic stenosis

C. Mitral regurgitation

D. Mitral valve prolapse
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