<prompt> The most common complication of Sub-valvular Aoic Stenosis is:Aoic RegurgitationMitral RegurgitationTricuspid regurgitationPulmonary Regurgitation  <response>: Answer is A Aoic Regurgitation Aoic regurgitation is the most common complication of subaoic stenosis. Aoic regurgitation is the most common complication of subaoic stenosis occurring in more than 50 of patients. Aoic Regurgitation is believed to be caused from Valvular damage due to the high-pressure Subvalvular systolic jet originating at the level of stenosis. 