See Appendix A for a tabular overview of the arterial distribution. The following describes the anatomical course of the coronary arteries. In general, the area of the heart which an artery passes over will be the area that it perfuses. It lies to the left of the middle cardiac vein and empties into the coronary sinus. Posterior cardiac vein – located on the posterior surface of the left ventricle.Middle cardiac vein (posterior interventricular vein) – begins at the apex of the heart and ascends in the posterior interventricular groove to empty into the coronary sinus.It travels within this groove onto the posterior surface of the heart, where it empties into the coronary sinus. Small cardiac vein – located on the anterior surface of the heart, in a groove between the right atrium and right ventricle.Here, it gradually enlarges to form the coronary sinus. It then curves to the left and continues onto the posterior surface of the heart. It originates at the apex of the heart and ascends in the anterior interventricular groove.
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