right coronary artery (RCA)

Origin: right aortic sinus Branches: 1) posterior interventricular artery 2) right marginal coronary artery 3) atrioventricular nodal artery 4) sinuatrial artery (90%) Distribution: 1) right ventricle 2) posterior wall (segment) 3) inferior wall/apex (many, if not most individuals) 4) AV node (90%) Course: 1) The RCA passes posterior to the pulmonary artery & along the AV groove between the right atrium & right ventricle. Branches from this segment of the RCA supply the free wall of the right ventricle 2) The RCA continues in the AV groove to supply a segment of the posterior wall of the heart. 3) A large posterior descending branch of the RCA may descend to supply the more of the posterior wall & the inferior wall/ apex of the heart.

Properties

GENERAL: coronary artery RELATED: atrioventricular node FORM: right coronary artery (RCA) BRANCHES: posterior interventricular (descending) artery right marginal coronary artery atrioventricular (AV) nodal artery sinuatrial (SA) nodal artery ORIGIN: aortic sinus COMPONENT-OF: heart