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Tricuspid valve leaflets (anatomy)

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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There are three tricuspid valve leaflets or cusps, so giving rise to the name of the valve:

  • septal
  • anterior
  • posterior

Points of note:

  • during diastole, they project into the ventricle and are widely separated from each other
  • each has a central, collagenous lamina fibrosa that is continuous with the fibrous annulus of the valve
  • the lamina fibrosa is surrounded by endocardium
  • the endocardium is continuous at the edges of the valve on the ventricular side with the chordae tendineae
  • individual leaflets are separated by their respective valve commissures, either anteroseptal, posteroseptal or anteroposterior; the commissures can be incomplete leading to fusion of valve leaflets
  • the surface of each leaflet is irregular at its edge due to the presence of numerous 'clefts' - most chordae tendinae insert into this roughened zone from the ventricular side of the valve

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