The mitral valve apparatus is composed of the anterior and posterior leaflets attached by chordae tendinae to their respective papillary muscles. The anterior leaflet is triangular and has a fibrous attachment to the aortic root; the posterior leaflet is quadrangular and is attached to two-thirds of the annulus fibrosis. The two leaflets are joined by commissural tissue. Whereas the anterior leaflet is mobile, the posterior is restricted in its movement and acts as a buttress so that in systole both leaflets are firmly apposed along their margins.
KeywordsMitral Valve Aortic Stenosis Mitral Regurgitation Infective Endocarditis Heart Sound
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