<prompt> A young athlete died of sudden cardiac arrest after atheletic activity. Postmoem finding revealed interventricular septal hyperophy. What is the most probable diagnosis?Dilated Cardiomyopathy DCMHyperophic Obstructive Cardiomyopathy HOCMAoic Stenosis ASVentricular Septal Defect VSD  <response>: Syncope and sudden death following competitive spos in young individuals is characteristic of Hyperophic Obstructive Cardiomyopathy HOCM. The presence of interventricular septal hyperophy in postmoem confirms the diagnosis of HOCM. Ref: Harrisons Principles of Internal Medicine, 16th Edition, Pages 1410-11; Davidsons Principles and Practice of Medicine, 19th Edition, Page 476 