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 as semicircular fold of the lining membrane of the right
atrium. It is situated at the base of the
inferior vena cava.[citation needed]
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).[citation needed]
^A. C. Thebesius. Disputatio medica inauguralis de circulo sanguinis in corde. Doctoral dissertation, Leiden, 1708.
^Loukas M, Clarke P, Tubbs RS, Kolbinger W (2007). "Adam Christian Thebesius, a historical perspective". International Journal of Cardiology. 129 (1): 138–40.
doi:
10.1016/j.ijcard.2007.06.048.
PMID17692957.