Chordae tendineae
| Chordae tendineae | |
|---|---|
 The chordae tendineae connect the valves to the heart muscle | |
 Papillary muscles and chordae tendineae | |
| Details | |
| Identifiers | |
| Latin | chordae tendineae cordis |
| MeSH | D002815 |
| TA98 | A12.1.00.023 |
| TA2 | 4047, 4069 |
| FMA | 76527 |
| Anatomical terminology | |
The chordae tendineae (sg.: chorda tendinea) or tendinous cords, colloquially known as the heart strings, are inelastic cords of
Structure
The chordae tendineae connect the
Tendon of Todaro
The tendon of Todaro is a continuation of the
Function
During atrial systole, blood flows from the atria to the ventricles down the pressure gradient. Chordae tendineae are relaxed because the atrioventricular valves are forced open.[6]
When the ventricles of the heart contract in ventricular systole, the increased blood pressures in both chambers push the AV valves to close simultaneously, preventing backflow of blood into the atria. Since the blood pressure in atria is much lower than that in the ventricles, the flaps attempt to evert to the low pressure regions. The chordae tendineae prevent this prolapse by becoming tense, which pulls on the flaps, holding them in closed position.[6]
Clinical significance
Ruptured chordae tendineae
Parachute mitral valve
Additional images
-
Papillary muscles and chordae tendineae -
Ultrasound showing redundant chordae tendineae[12]
See also
References
- ^ Hacking, Craig. "Chordae tendineae | Radiology Reference Article | Radiopaedia.org". Radiopaedia.
- ^ ISBN 978-0-323-37804-8, retrieved 2020-11-25
- ISBN 978-1-4160-3206-9, retrieved 2020-11-25
- PMID 24748954.
- PMID 1519544.
- ^ PMID 5422929.
- ^ ISBN 978-0-12-420219-1, retrieved 2020-11-25
- ISBN 978-0-323-05711-0, retrieved 2020-11-25
- ^ Llewelyn, Rhys. "Parachute mitral valve | Radiology Reference Article | Radiopaedia.org". Radiopaedia.
- ^ ISBN 978-0-7020-6929-1, retrieved 2020-11-25
- ^ ISBN 978-0-7020-3426-8, retrieved 2020-11-25
- ^ "UOTW #75 - Ultrasound of the Week". Ultrasound of the Week. 4 November 2016. Retrieved 27 May 2017.
