Fig. 1

Volumetric rendering of a left dominant coronary circulation from cCTA. a Left anterior oblique view demonstrates the left anterior descending artery coursing down the anterior interventricular groove (black arrowhead) and the circumflex artery coursing in the left atrioventricular groove (white arrowhead). b View of the base of the heart from the left side demonstrates the continuation of the circumflex artery in the posterior left atrioventricular groove (arrowhead), extending to the crux of the heart where it continues as the posterior descending artery (white arrow)