Figure 1.

(A) Diagrammatic illustration of mitral valve in surgical view after opening left atrium. Note: left atrial appendage (LAA) is located at the left side of surgeon and aorta is located anterior. (B) Corresponding view acquired by 3D-TEE (zoom mode). Note: normal indentations between posterior scallops during diastole which are closed in systole without causing mitral regurgitation. AOV = aortic valve, A1 = anterolateral segment, A2 = anteromiddle segment, A3 = anteromedial segment, AC = anterolateral commissure, PC = posteromedial commissure, P1 = posterolateral scallop, P2 = posteromiddle scallop, P3 = posteromedial scallop.