The
atria of the
heart are separated from the
ventricles by the
coronary sulcus (also called
coronary groove,
auriculoventricular groove,
atrioventricular groove,
AV groove); this contains the trunks of the nutrient vessels of the heart, and is deficient in front, where it is crossed by the root of the
pulmonary trunk. On the posterior surface of the heart, the coronary sulcus contains the
coronary sinus.