The<unk>  artery curves to the left around the heart within the coronary sulcus, giving rise to one or more diagonal or left marginal arteries (also called obtuse marginal branches (OM)) as it curves toward the posterior surface of the heart. It helps form the posterior left ventricular branch or posterolateral artery. The<unk>  artery ends at the point where it joins to form to the posterior interventricular artery in ten percent of all cases, which lies in the posterior interventricular sulcus. In the other 90% of all cases the posterior interventricular artery comes out of the right coronary artery.
Left circumflex artery
Left anterior descending artery
Left coronary artery
Right coronary artery
Left main coronary artery
Right marginal branch of right coronary artery
Atrioventricular nodal branch
Posterior interventricular artery