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Figure 3 Evaluation of asymmetric opening of the mitral leaflets in the short-axis view of their maximal opening at the level of the leaflet tips. The anteroposterior or vertical (V) and side-to-side or horizontal (H) dimensions are noted. The image on the right from a patient with IMLC shows the characteristic flattening of the normally round anterior leaflet in this configuration. LV, left ventricle; LA, left atrium.