Three-dimensional transesophageal echocardiography normal mitral valve (seen from left atrial perspective)

A1: lateral scallop of the anterior leaflet; A2: middle scallop of the anterior leaflet; A3: medial scallop of the anterior leaflet; P1: lateral scallop of the posterior leaflet; P2: middle scallop of the posterior mitral valve leaflet; P3: medial scallop of the posterior mitral valve leaflet.