Chordae tendineae of right atrioventricular valve

The chordae tendineae of the right atrioventricular (tricuspid) valve are fibrous cords that connect the ventricular surfaces of the tricuspid valve leaflets to the papillary muscles and, in some cases, directly to the interventricular septum. These structures prevent prolapse of the valve leaflets into the right atrium during ventricular systole.

The number of chordae tendineae per papillary muscle is variable, with the anterior papillary muscle typically giving rise to more chordae than the posterior or septal papillary muscles. The branching pattern of the chordae can be single, fan-shaped, or web-like, and they insert into the free edge and ventricular surface of the leaflets, providing structural support and ensuring proper coaptation during systole.