Fig. 1.

Transthoracic echocardiogram of the patient. Parasternal long axis view shows (a) thickened interventricular septum in diastole (IVd) measuring 23 mm and a mild thickened posterior wall in diastole (PWd) measuring 14 mm, and (b) moderately severe posteriorly-directed mitral regurgitation (arrow). (c) Parasternal short axis view shows markedly thickened interventricular septum during diastole (IVd) and a mild thickened posterior wall (PWd), with a ratio of 1.64. (d) Apical four-chamber view shows systolic anterior motion (SAM) of the mitral leaflet during systole (arrow).