Color flow Doppler of aortic regurgitation

The color flow Doppler from the long axis precordial view shows moderate aortic regurgitation (AR) with a jet width at its origin (vena contracta) about half of the left ventricular outflow tract (LVOT) diameter (arrow). Panel A is an M-mode echocardiogram with color flow Doppler, obtained from the two dimensional echocardiogram in the plane indicated by the dotted line (M-line); the AR jet is seen within the left ventricle (LV).