Normal Mitral Valve Function

  • Also known as the left atrioventricular valve, the mitral valve has 2 leaflets which are anchored to the ventricle floor by papillary muscles and chordae tendinae, as are the leaflets of the right atrioventricular valve (tricuspid valve).
  • The aortic and pulmonary (pulmonic) valves are semilunar valves, and have thin cusps with thickened edges which seal during diastole (when the ventricles are relaxed and blood flows into the atria).
  • The mitral valve prevents backflow from the left ventricle into the atrium; minor mitral valve prolapse or leak is usually clinically insignificant.


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