Tricuspid Valve

The atrioventricular valve between right atrium and right ventricle. With the help of sails it closes the right ventricle against the atria during contraction.

It consists of three soft connective tissue leaflets, the anterior cuspis, posterior cuspis and septalis cuspis. The leaflets spring from the right Anulus fibrosus, one of the four fibrous rings of the heart that surround the heart valves.

The leaflets of the tricuspid valve are attached to the papillary muscles located towards the chamber by tendon threads (Chordae tendineae).

As the pressure in the right chamber increases, the flap sails lie passively, flush against each other. The papillary muscles prevent the valve from turning into the right atrium, with the resulting reflux (regurgitation), due to their contraction taking place shortly before and the resulting tension on the tendon threads.

pathology of the tricuspid valve: A narrowing of the opening between the valve sails is called tricuspid stenosis. A loss of the closing ability of the flap sails leads to tricuspid insufficiency. A (very rare) complete absence of the valve is called tricuspid atresia.

https://de.wikipedia.org/wiki/Trikuspidalklappe _{(Wikipedia CC-by-sa-3.0)}