Floppy mitral valve
Myxomatous degeneration of the mitral valve. Long axis of left ventricle demonstrating hooding with prolapse of the posterior mitral leaflet into the left atrium (arrow). The left ventricle is on the right in this apical four-chamber view.The essential histological change is attenuation of the fibrosa layer of the valve accompanied by focally marked thickening of the spongiosa layer with deposition of mucoid (myxomatous) material (center)
Floppy mitral valve