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CORONARY SINUS
| Coronary sinus |
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| Base and diaphragmatic surface of heart. |
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| Interior of right side of heart. |
| Gray's |
subject #138 530 |
The coronary sinus is a vein that collects blood from the myocardium of the heart. It is present in humans and other animals.
It is located between the left atrium and ventricle on the posterior surface of the heart. It drains into the right atrium.
The coronary sinus collects about 60 percent of the blood supplied to the heart by the coronary arteries. It receives blood mainly from the small, middle, great and oblique cardiac veins. The anterior cardiac veins drain directly into the right atrium. (Some small veins drain into any of the four chambers of the heart.)
It runs transversely in the groove between the left atrium and ventricle on the posterior surface of the heart.It drains into the right atrium on the posterior, inferior surface, medial to the inferior vena cava opening. The coronary sinus orifice (opening) is just superior to the septal leaflet of the tricuspid valve.
It receives blood mainly from the small, middle, great and oblique cardiac veins. It also receives blood from the left marginal vein and the left posterior ventricular vein. The anterior cardiac veins drain directly into the right atrium. (Some small veins drain into any of the four chambers of the heart.)
See also
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