Fig. 3From: Systolic characteristics and dynamic changes of the mitral valve in different grades of ischemic mitral regurgitation – insights from 3D transesophageal echocardiographyNon-planar angle. Anterior view of the mitral valve in mid-systole: a 3D TEE surface rendering. b wire frame images. The non-planar angle is assessed as maximal level of “non-planarity” on the line between mid-anterior (blue) and mid-posterior (red) pointBack to article page