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Related Experiment Videos

The tricuspid valve is bicuspid

S Victor1, V M Nayak

  • 1Heart Institute, Madras, India.

The Journal of Heart Valve Disease
|January 1, 1994
PubMed
Summary

The tricuspid valve

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Area of Science:

  • Cardiovascular Anatomy
  • Cardiac Surgery
  • Human Anatomy

Background:

  • The tricuspid valve exhibits significant individual variability in its structure.
  • Existing nomenclature for tricuspid valve components can be confusing.
  • Understanding this variability is crucial for surgical and diagnostic procedures.

Purpose of the Study:

  • To analyze the anatomical variations of the tricuspid valve in normal human hearts.
  • To propose a simplified and logical subdivision of the tricuspid valve based on functional and embryological principles.
  • To bring order to the complex anatomy of the right ventricle's interior.

Main Methods:

  • Examination of 100 normal human autopsy hearts.
  • Detailed analysis of tricuspid valve cusp configuration.
  • Assessment of chordal and papillary muscle support structures.
  • Subdivision of the tricuspid valve based on functional and embryological criteria.

Main Results:

  • Confirmed extensive variations in tricuspid valve cusp and support structures.
  • Proposed a functional subdivision into septal and mural cusps.
  • Demonstrated that the mural cusp requires clefts due to annular dynamics.
  • Identified an embryological basis for dividing the valve into superior and inferior halves.
  • Showed that both functional and embryological divisions simplify the complex anatomy.

Conclusions:

  • The tricuspid valve's internal structure is highly individualized.
  • A functional division into septal and mural cusps provides clarity.
  • An embryological division offers an alternative, orderly perspective.
  • These subdivisions help to rationalize the complex anatomy of the tricuspid valve and right ventricle.

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