The ostium of the posterior interventricular vein is typically
near the ostium of the coronary sinus itself. In most human
hearts we have observed a valve associated with the ostium as
this venous drainage enters the coronary sinus.
This cardiac vein returns deoxygenated blood (containing
metabolic waste products) from the posterior aspects of both
the right and left ventricles. This vein typically follows
along the posterior ventricular septal border.