Intraoperative transesophageal echocardiography with color-flow Doppler mapping (midesophageal long axis view) showed a significant MR jet (white arrow) and mosaic flow signals in the left ventricular outflow tract (red arrow). LA = left atrium; LV = left ventricle; LVOT = left ventricular outflow tract; MR = mitral regurgitation; Ao = aorta. An additional movie file shows this in more detail (see Additional file 1)