The tiny white cords that anchor the cusps or flaps of the endocardium to the walls of the ventricles are Chordae tendineae.
What is Chordae tendinae?
The chord-like structures that join leaflets to the papillary muscle are known as chordae tendinae. They are categorized as follows after emerging from the papillary muscles:
- Marginal chordae (primary chordae) are inserted on the free margin of the leaflets and serve to stop the prolapse of the leaflet margin.
- Intermediate chordae (secondary chordae) relieve the valvular tissue of excess stress by inserting it into the ventricular surface of the leaflets. They might also be crucial for maintaining the size and functionality of the ventricles.
- The papillary muscle and mitral annulus are connected to each other by basal chordae (tertiary chordae), which are only present in the posterior leaflet.
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