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Figure 8: This is an en face view of the left ventricular aspect of the ventricular septum in a patient with atrioventricular septal defect. The free walls of the left atrium and left ventricle have been cropped. The viewer is looking from left to right. This view demonstrates the left ventricular infl ow-outfl ow disproportion that characterizes AV septal defect. Note the crescentic inferior margin of the atrial septum, and the scooped-out edge of the interventricular septum. This view provides excellent anatomic detail regarding the relationships between the bridging leafl ets of the common AV valve (CAVV) and the septal structures. P, posterior; S, superior

Figure 8: This is an en face view of the left ventricular aspect of the ventricular septum in a patient with atrioventricular septal defect. The free walls of the left atrium and left ventricle have been cropped. The viewer is looking from left to right. This view demonstrates the left ventricular infl ow-outfl ow disproportion that characterizes AV septal defect. Note the crescentic inferior margin of the atrial septum, and the scooped-out edge of the interventricular septum. This view provides excellent anatomic detail regarding the relationships between the bridging leafl ets of the common AV valve (CAVV) and the septal structures. P, posterior; S, superior