Supporting information
Additional supporting information may be found online in the Supporting Information section.
Movie S1. Apical two-chamber transthoracic echocardiography view showing no obvious vegetation. LA = Left atrium; LV = left ventricle.
Movie S2. Bicommissural transesophageal echocardiography view showing a mobile vegetation on the surface of left ventricular muscle just below the anterolateral commissure of the mitral valve. LV = Left ventricle.