fig38

Figure 38. Selected video frames from apical short-axis (A, B) and apical four-chambered (C) views, illustrating mitral valve cleft (MC) (arrows in A, B) in two separate stages of cardiac contraction in a patient with an ostium primum atrial septal defect (PASD) (C). Left atrium (LA), left ventricle (LV), right atrium (RA), and right ventricle (RV) are marked.