Circulatory System of the Coronary Blood Vessels

Description

Viewed from the right side, the right atrium and right ventricle occupy the anterior silhouette, with the pulmonary trunk and ascending aorta emerging superiorly at the base. The right coronary artery courses in the right atrioventricular (coronary) sulcus between atrium and ventricle, giving an acute marginal branch that descends along the acute margin toward the apex. Blue venous channels track the arterial paths, with cardiac veins converging posteriorly toward the coronary sinus in the atrioventricular groove. Epicardial fat and the surface sulci help orient the vessel trajectories. Right-dominant and left-dominant coronary patterns hinge on what happens as the right coronary artery approaches the crux, where it may give rise to the posterior interventricular artery and influence perfusion of the inferior wall and the atrioventricular node. This angle clarifies why inferior ST-elevation myocardial infarction often implicates the right coronary artery, and it also supports teaching around right ventricular infarction when the acute marginal branches are involved. For interventional cardiology, the course along the right atrioventricular groove is a practical roadmap when correlating anatomy with catheter-based coronary angiography and when anticipating where lesions cluster along curved segments and branch points. Common use cases include gross anatomy and cardiovascular physiology teaching on coronary circulation, board-style review figures on myocardial territories, and journal or textbook diagrams discussing ischemia of the inferior wall and conduction system blood supply. It also fits cath lab patient education materials when explaining right coronary artery stenosis and venous return via the coronary sinus. Anatomical accuracy verified by SciePro's Medical Advisory Board.