Figure 1.

Echocardiogram of one subject (individual IV.1, kindred 1) with MMVP. a, Two-dimensional echocardiogram in the parasternal long-axis view. The arrow indicates the displacement of the mitral leaflets above the line connecting the midportions of the annular hinge points (shown as a dashed line). RV=right ventricle; LV=left ventricle; Ao=aorta; LA=left atrium; and PML=posterior mitral leaflet. b, M-mode recording in the parasternal long-axis view. The arrow indicates the increased thickness of the AML. Its measurement is performed in the midportion of the leaflet and is shown as a dashed line.