Circumflex and Obtuse Marginals in a Right Dominant System

The normal coronary arteries of the post mortem specimen have been injected with barium. The heart is projected in lateral projection. The branches of the circumflex coronary artery have been overlaid in red (b) as they supply the lateral and posterolateral portion of the left ventricle. In this case there are at least 4 obtuse marginal vessels with OM4 supplying the “buttocks” of the LV.

Courtesy: Ashley Davidoff, M.D.