3D CONTENT
3D HEART ANATOMY

RIGHT ATRIOVENTRICULAR VALVE

Author: Dr. Bogdan Leahu

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TABLE OF CONTENTS

RIGHT ATRIOVENTRICULAR VALVE

What is the right atrioventricular valve?

  • Also known as tricuspid valve
  • One of two atrioventricular valves
  • Regulates blood flow between your right atrium and right ventricle
  • Opens and closes during your cardiac cycle
  • Ensures unidirectional blood flow
  • Prevents backflow into atrium during ventricular contraction

RIGHT ATRIOVENTRICULAR ORIFICE

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What is the right atrioventricular orifice?

  • Opening between your right atrium and right ventricle
  • Surrounded by tricuspid valve
  • Larger than left atrioventricular opening
  • Accommodates venous blood volume returning from your body

LEAFLETS OF TRICUSPID VALVE

Tricuspid valve leaflets 360-degree interactive viewer showing superior, inferior, and septal cusps
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How many cusps does the tricuspid valve have?

  • Characterized by three cusps

Superior Leaflet (Anterior)

What is the superior leaflet of the tricuspid valve?

  • Also called anterior leaflet
  • Largest of three leaflets
  • Situated at top of valve structure

Inferior Leaflet (Posterior)

What is the inferior leaflet of the tricuspid valve?

  • Also called posterior leaflet
  • Located at bottom of valve
  • Vital for sealing the orifice during ventricular contraction

Septal Leaflet

What is the septal leaflet of the tricuspid valve?

  • Positioned adjacent to interventricular septum
  • Numerous tendinous cords attach directly to ventricular septum
  • Hinge inserted closer to cardiac apex
  • Positioned more apically than mitral valve leaflets on left side

TENSION APPARATUS

Tension apparatus 360-degree interactive viewer showing papillary muscles and chordae tendineae
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What is the tension apparatus of the tricuspid valve?

  • Essential for proper valve function
  • Prevents leaflet inversion into atrium
  • Prevents valve prolapse during ventricular systole
  • Components:
    • Papillary muscles
    • Chordae tendineae

Papillary Muscles

What are the papillary muscles of the right ventricle?

  • Contract with your ventricular myocardium
  • Simultaneous contraction with your ventricle
  • Tighten chordae tendineae
  • Secure leaflets in position

Chordae Tendineae

What are the chordae tendineae?

  • Tendinous cords connecting leaflets to papillary muscles
  • Tightened during ventricular contraction
  • Anchor leaflets to prevent eversion

Coordinated Action

How does the tension apparatus coordinate valve closure?

  • Ensures efficient valve closure in your heart
  • Prevents regurgitation of blood into your right atrium

BIBLIOGRAPHY

1. Gray H, Lewis W. Angiology. In: Anatomy of the Human Body. 1918. p. 526–542.

2. Gosling JA, Harris PF, Humpherson JR, Whitmore I, Willan PLT. Human anatomy: color atlas and textbook. 6th ed. 2017. 45–58 p.

3. Anderson RH, Spicer DE, Hlavacek AM, Cook AC, Backer CL. (2013). Anatomy of the cardiac chambers. In Wilcox’s Surgical Anatomy of the Heart (4th ed., pp. 13–50). Cambridge University Press.

4. Fritsch H, Kuehnel W. Color Atlas of Human Anatomy. Vol. Volume 2, Color Atlas and Textbook of Human Anatomy. 2005. 10–42 p.

5. Moore K, Dalley A, Agur A. Clinically Oriented Anatomy. Vol. 7ed, Clinically Oriented Anatomy. 2014. 132–151 p.

6. Ho SYen. Anatomy for Cardiac Electrophysiologists: A Practical Handbook. Cardiotext Pub; 2012. 5–27 p.

7. The structure and organization of anatomical terms used in this text follow the guidelines provided by FIPAT (2019) in their publication: FIPAT. (2019). Terminologia Anatomica (2nd ed.). FIPAT.library.dal.ca. Federative International Programme for Anatomical Terminology. Retrieved May 7, 2023, from https://fipat.library.dal.ca/TA2/