28+ Coronary Sinus Anterior Cardiac Vein Background. It returns the majority of the blood supply for the left ventricle to the right atrium. It typically begins around the apex and ends as it reaches the atrioventricular groove.

Coronary Sinus Wikipedia
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Most cardiac veins empty into the. It typically begins around the apex and ends as it reaches the atrioventricular groove. The coronary sinus starts at the junction of the great cardiac vein and the oblique vein of the left atrium.

Cardiac veins (drain into the coronary sinus).

The coronary veins return blood from the myocardium back to the right atrium. The anterior interventricular vein courses between the left and right ventricle on the anterior side of the heart. Open the chambers of the heart, and examine internal features. Cannulation of the coronary sinus (cs) is a prerequisite for left ventricular (lv) pacing and certain ablation procedures.