Artery tracings highlighted main artery branches (C and F) or main and lower-order arteries (D, E, G, and H) originating from right (RCA, orange) or left (LCA, blue) coronary ostia. Co-dominance was indicated when IVG arteries stemmed from both the RCA and LCA (F and G) and RCA and LCA branches occupied the inferior septum (arrow, H).
