posterior interventricular sulcus posterior interventricular sulcus the posterior interventricular sulcus or posterior longitudinal sulcus is one of the two grooves separating the ventricles of the heart (the other being the anterior interventricular sulcus). it is located on the diaphragmatic surface of the heart near the right margin. it extends between the coronary sulcus, and the (notch of) apex of the heart. it contains the posterior interventricular artery, and middle cardiac vein. posterior interventricular sulcusbase and diaphragmatic surface of heart. (posterior interventricular sulcus visible at lower left, where the middle cardiac vein is labeled.)detailsidentifierslatinsulcus interventricularis posteriorta98a12.1.00.010ta23944fma7178anatomical terminology