Valve_of_coronary_sinus
Valve of coronary sinus
Fold in the interior lining of the right atrium of the heart
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.