Mitral regurgitation (MR) in hypertrophic cardiomyopathy (HCM) patients is mainly due to systolic anterior motion (SAM) of the mitral valve (MV). However, other mechanisms contributing to mitral regurgitation may coexist as a result of further structural abnormalities. SAM might occur because of the increased septal thickness alone or due to simultaneous MV or subvalvular apparatus anomalies, such as mitral lea...