Valve of coronary sinus
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In the anatomy of the heart, the valve of the coronary sinus (also called the Thebesian valve, after Adam Christian Thebesius[1][2][3]) is a valve located at the orifice of the coronary sinus where the coronary sinus drains into the right atrium.[4] It prevents blood from flowing backwards into the coronary sinus during contraction of the heart.
Anatomy
The valve of the coronary sinus is a thin, semilunar (half-moon-shaped) valve located on the anteroinferior part of the opening into the right atrium.[5] It is formed by a semicircular fold of the lining membrane of the right atrium. It is situated at the base of the inferior vena cava.Script error: No such module "Unsubst".
Variation
The valve may be completely absent;[6] it is present in 73-86% of individuals.[7]
The valve may vary in size.[6] It may be double, or it may be cribriform (containing numerous small holes).Script error: No such module "Unsubst".
Function
The valve prevents regurgitation of blood into the sinus during systole (i.e. the contraction of the atrium).[4]
References
Public domain This article incorporates text in the public domain from Template:Wikidatathe 20th edition of Gray's Anatomy (1918)
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- ↑ A. C. Thebesius. Disputatio medica inauguralis de circulo sanguinis in corde. Doctoral dissertation, Leiden, 1708.
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- ↑ a b Script error: No such module "citation/CS1".
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- ↑ a b P. Felle, J. G. Bannigan. Anatomy of the valve of the coronary sinus (thebesian valve). Clinical Anatomy. Vol. 7 (1), 10-12. Abstract
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