The Heart Valves  


    Pulmonary valve Aortic Valve
  • Guards the outflow tract of the right ventricle, and lies above the infundibulum (conus arteriosus).

  • Consists of three semi-lunar cusps namely:

(+) Anterior

(+) Right

(+) Left

  • The pulmonary trunk is dilated above each of the semilvnar cusps to form three sinuses of valsava.
  • Guards the outlet of the left ventricle
  • Found at a lower level than the pulmonary valve

It Consists of three semilunar cusps whose structure is similar to those of the pulmonary cusps. The cusps are named:

  • Posterior
  • Right
  • Left

  Mitral valve The Tricuspid valve

This guards the left atrioventricular orifice.

It has two cusps

  • Anterior cusp (larger)
  • Posterior cusp

Two papillary muscles in the left ventricle:

  • Anterior
  • Posterior

The chordae from each muscle insert into points on both cusps of the mitral valve.

  • Guards the right atrioventricular orifice.

The leaflets of the tricuspid valve are termed:

(+) Septal
(+) Anterior
(+) Posterior

  • Leaflets held in place by papillary muscles and their attached chordae tendinae.

  • There are two main papillary muscles – anterior and posterior


Home | Project Anatomy | Gross Anatomy | Topic Index | Chapter 29

Chapter 29: The Middle Mediastinum, Heart and Pericardium and the Superior Mediastinum