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3D HEART ANATOMY

RIGHT ATRIOVENTRICULAR VALVE

Author: Dr. Bogdan Leahu
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Right atrioventricular valve anatomy 360-degree interactive viewer showing tricuspid valve structure and leaflets
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Right Atrioventricular Valve - Overview, Preview from the app.

TABLE OF CONTENTS

RIGHT ATRIOVENTRICULAR VALVE

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

RIGHT ATRIOVENTRICULAR ORIFICE

Right atrioventricular orifice 360-degree interactive viewer showing opening between right atrium and ventricle
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Right Atrioventricular Orifice, Preview from the app.

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

LEAFLETS OF TRICUSPID VALVE

Tricuspid valve leaflets 360-degree interactive viewer showing superior, inferior, and septal cusps
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Tricuspid Valve Leaflets, Preview from the app.

  • Characterised by three cusps

Superior Leaflet (Anterior)

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

Inferior Leaflet (Posterior)

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

Septal Leaflet

  • 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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Tension Apparatus, Preview from the app.

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

Papillary Muscles

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

Chordae Tendineae

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

Coordinated Action

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

BIBLIOGRAPHY

1. Drake RL, Vogl AW, Mitchell AWM. Gray's Anatomy for Students. 4th ed. Philadelphia: Elsevier; 2020. Chapter 3: Thorax.

2. Standring S, editor. Gray's Anatomy: The Anatomical Basis of Clinical Practice. 42nd ed. Edinburgh: Elsevier; 2021. p. 996-1046.

3. Moore KL, Dalley AF, Agur AMR. Clinically Oriented Anatomy. 8th ed. Philadelphia: Wolters Kluwer; 2018. p. 127-162.

QUICK FACTS: RIGHT ATRIOVENTRICULAR VALVE

Key questions answered about this anatomy topic

Q: What is the alternative name for the right atrioventricular valve?

Answer: Tricuspid valve. The right atrioventricular valve is also known as the tricuspid valve because it has three cusps (leaflets).

Q: What is the primary function of the right atrioventricular valve?

Answer: Regulate blood flow between right atrium and right ventricle. The right atrioventricular valve regulates blood flow between the right atrium and right ventricle, ensuring unidirectional flow and preventing backflow during ventricular contraction.

Q: How does the size of the right atrioventricular orifice compare to the left?

Answer: Larger than the left. The right atrioventricular orifice is larger than the left atrioventricular opening to accommodate the venous blood volume returning from the body.

Q: How many leaflets does the tricuspid valve have?

Answer: Three. The tricuspid valve has three leaflets (cusps): the superior (anterior), inferior (posterior), and septal leaflets.

Q: Which leaflet of the tricuspid valve is the largest?

Answer: Superior (anterior) leaflet. The superior leaflet, also called the anterior leaflet, is the largest of the three leaflets and is situated at the top of the valve structure.

Want to test yourself? Try the interactive quiz above!

⋮⋮ Right Atrioventricular Valve Quiz
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