Figure 9: A - An echocardiogram in apical 4 - chamber view in a patient with ASD1 (arrow). The defect is just above the closure plane of the AV valves. B - Color Doppler exam in the same view showing mitral regurgitation (++), most likely through the cleft in the anterior mitral leaflet. LA - left atrium; LV left ventricle; RA - right atrium; RV - right ventricle. (Reprinted from Valente et al. [11] with permission).