PATHOLOGY A 22 year old male presents to the echo lab to scr…

PATHOLOGY A 22 year old male presents to the echo lab to screen for heart disease.  The patient had a history of passing out during football practice in high school, and his father died suddenly in his early 30s. Upon examination, the ejection fraction is 65%, the E inflow velocity of the mitral valve appears lower than the velocity of the A wave.  What is the most likely diagnosis?