Mitral Valve

  • Michael Y. Henein
  • Mary Sheppard
  • John Pepper
  • Michael Rigby


The mitral valve is composed of two leaflets, an annulus, chordae tendineae, and two papillary muscles. The anterior (aortic) leaflet is attached to the root of the aorta in direct continuity with the aortic valve and the membranous septum, and has a rectangular shape involving onethird of the circumference of the annulus. The posterior leaflet is continuous with the posterior wall of the left atrium and is longer than the anterior leaflet, occupying two-thirds of the circumference of the mitral annulus. The posterior leaflet is generally divided into three scallops, but this may vary. Chordae arise from the ventricular margin of the two leaflets and are inserted into the papillary muscles, which are placed one anteromedially and the other posterolaterally in the wall of the left ventricle. Papillary muscles themselves are continuous with the trabeculae and subendocardial layer of the ventricular wall.


Mitral Valve Mitral Regurgitation Papillary Muscle Mitral Stenosis Mitral Valve Replacement 
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Copyright information

© Springer-Verlag London 2004

Authors and Affiliations

  • Michael Y. Henein
    • 1
  • Mary Sheppard
    • 2
  • John Pepper
    • 1
  • Michael Rigby
    • 2
  1. 1.Imperial CollegeRoyal Brompton HospitalLondonUK
  2. 2.Royal Brompton HospitalLondonUK

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