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The chordae tendineae (sg.: chorda tendinea) or tendinous cords, colloquially known as the heart strings, are inelastic cords of fibrous connective tissue that connect the papillary muscles to the tricuspid valve and the mitral valve in the heart.
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).
64103 Ensembl ENSG00000000005 ENSMUSG00000031250 UniProt Q9H2S6 Q9EP64 RefSeq (mRNA) NM_022144 NM_022322 RefSeq (protein) NP_071427 NP_071717 Location (UCSC) Chr X: 100.58 – 100.6 Mb Chr X: 132.75 – 132.77 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Tenomodulin, also referred to as tendin, myodulin, Tnmd, or TeM, is a protein encoded by the TNMD (Tnmd) gene and was discovered ...
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 ...
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. The function of the subvalvular apparatus is to keep the valves from prolapsing into the atria when they close. [7]
The AV node functions as a critical delay in the conduction system. Without this delay, the atria and ventricles would contract at the same time, and blood wouldn't flow effectively from the atria to the ventricles. The delay in the AV node forms much of the PR segment on the ECG, and part of atrial repolarization can be represented by the PR ...
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.
A tendon or sinew is a tough band of dense fibrous connective tissue that connects muscle to bone.It sends the mechanical forces of muscle contraction to the skeletal system, while withstanding tension.