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The chordae tendineae connect the atrioventricular valves (tricuspid and mitral), to the papillary muscles within the ventricles. [2] Multiple chordae tendineae attach to each leaflet or cusp of the valves. [3] Chordae tendineae contain elastin in a delicate structure notably at their periphery. [4]
The papillary muscles are muscles located in the ventricles of the heart. They attach to the cusps of the atrioventricular valves (also known as the mitral and tricuspid valves) via the chordae tendineae and contract to prevent inversion or prolapse of these valves on systole (or ventricular contraction).
Heart in motion: the anterior walls of the ventricles are removed. The action of the tricuspid valve, located in the right ventricle, is seen on the left portion of this illustration. The three leaflets with their attached chordae tendineae and papillary muscles can be seen.
The chordae tendineae are attached to papillary muscles that cause tension to better hold the valve. Together, the papillary muscles and the chordae tendineae are known as the subvalvular apparatus. Together, the papillary muscles and the chordae tendineae are known as the subvalvular apparatus.
Parachute mitral valve occurs when all chordae tendineae of the mitral valve are abnormally attached to a single (or fused) papillary muscle. Straddling Mitral Valve occurs when the mitral valve's chordal attachments straddles, or goes through, a ventricular septal defect (VSD) and so has chordae originating on both sides of the ventricular ...
Some are attached along their entire length on one side and merely form prominent ridges, Others are fixed at their extremities but free in the middle, as in the moderator band in the right ventricle, or the papillary muscles that holds chordae tendinae, which are connected to cusps of valves to control flow of blood into the heart
Chordae tendineae are attached to the ventricular surfaces and the free edges of the two leaflets. Chordae are also attached to the two papillary muscles of left ventricle. Anterior leaflet is much larger than the posterior leaflet but posterior has a broader base, approaching two thirds of circumflex [36]
The moderator band (also known as septomarginal trabecula [1]) is a band of cardiac muscle found in the right ventricle of the heart. [2] [3] [4] It is well-marked in sheep and some other animals, including humans.