Cardiac fibrous skeleton
Citation, DOI, disclosures and article data
Citation:
Hacking C, Cardiac fibrous skeleton. Reference article, Radiopaedia.org (Accessed on 06 Dec 2024) https://doi.org/10.53347/rID-49278
Permalink:
rID:
49278
Article created:
Disclosures:
At the time the article was created Craig Hacking had no recorded disclosures.
View Craig Hacking's current disclosures
Last revised:
Disclosures:
At the time the article was last revised Craig Hacking had no recorded disclosures.
View Craig Hacking's current disclosures
Revisions:
2 times, by
1 contributor -
see full revision history and disclosures
Systems:
Sections:
Synonyms:
- fibrous skeleton of the heart
- fibrous skeleton
The fibrous skeleton of the heart is a complex set of collagenous rings that connect annuli of all four cardiac valves. Between the four annuli are two trigones (right and left) and the membranous portions of the interatrial, interventricular, and atrioventricular septa. The annuli of the two semilunar valves are attached in a manner that resemble a figure of 8, which lies obliquely, almost vertically oriented in the sagittal plane.
There are several vital functions of the skeleton:
- anchors the bases of the cardiac valves
- keeps the atrioventricular and semilunar orifices patent
- anchors the myocardium of the walls of all four cardiac chambers
- allows independent atrial and ventricular contraction by electrically insulating the atria above the fibrous skeleton from the ventricles below
References
- 1. Moore KL, Agur AMR, Dalley AF. Clinically oriented anatomy. LWW. ISBN:1451119453. Read it at Google Books - Find it at Amazon
- 2. Last's anatomy, regional and applied. Churchill Livingstone. ISBN:044304662X. Read it at Google Books - Find it at Amazon
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