10+ Coronary Sinus Opening In Right Atrium Pictures. It also receives blood from the left marginal vein and the left posterior ventricular vein. It then opens into the right.

Coronary Sinus Wikipedia
Coronary Sinus Wikipedia from upload.wikimedia.org
The coronary sinus which drains blood from the muscular. The coronary sinus is the largest cardiac venous structure. Pulmonary veins left atrium coronary sinus opening right pulmonary veins right pulmonary artery superior vena cava.

It passes between the right auricle and the pulmonary trunk in the atrioventricular groove.

Multiple coronary arteriovenous fistulas to the coronary sinus with an unruptured coronary sinus aneurysm and restrictive coronary sinus opening to the right atrium. Three aortic sinuses, or sinuses of valsalva, are the left, right and posterior that give rise to the two coronary arteries, the posterior there is a persistent left superior caval vein (scv) opening to the leftward and cranial margin of the left atrium. After blood passes through the capillaries in the myocardium, it enters a system of cardiac most of the cardiac veins drain into the coronary sinus, which opens into the right atrium. Multiple coronary arteriovenous fistulas to the coronary sinus with an unruptured coronary sinus aneurysm and restrictive coronary sinus opening to the right atrium.