Posterior Right Circulation

The posterior aspect of the heart shows a barium injection of the right coronary artery. Image (a) shows the continuation of the RCA after it has given off the acute right marginal artery. Image (b) shows the posterior descending artery that runs along the interventricular groove. Image (c) adds the posterior left ventricular branches while image (d) shows the completion of the posterior cross as the atrioventricular nodal artery courses superiorly toward the IVC (overlaid in blue). This system is a completely dominant right coronary system since the posterior crux is totally supplied by the RCA.

Courtesy: Ashley Davidoff, M.D.