Apical 5-chamber echocardiogram showing systolic anterior motion (SAM) of the mitral valve (MV) in a patient with hypertrophic cardiomyopathy (HCM)

Apical five-chamber transthoracic echocardiogram showing minimal systolic anterior motion (SAM) of the mitral valve under basal resting conditions (panel A) which is markedly worsening during exercise (panel B) resulting in mitral-septal contact and obstruction in the left ventricular outflow tract.