Coronary artery dominance

Associate Editor-In-Chief:

Coronary Artery Dominance
Describes how many of the three major branches supplying the inferior wall of the heart arise from the right coronary artery (RCA) and how many arise from the circumflex artery (CX).

Large right dominant
This occurs when the descending, inferior, and posterior branches all arise from the RCA.

Small right dominant
This occurs when the descending and inferior branches arise from the RCA and the posterior branch arises from the CX.

Co-dominant
This occurs when only the descending branch arises from the RCA, while the inferior and posterior branches arise from the CX.

Left dominant
This occurs when all three branches arise from the CX.