Abstract
A 52-year-old man underwent coronary computed tomography (CT) angiography for evaluation of suspected atherosclerotic coronary artery disease (CAD). CT angiography revealed a dual right coronary artery (RCA) with a single proximal trunk splitting into two branches in the region of mid-RCA, immediately after origin of an early branching acute marginal artery (AM). The two similar-sized branches were seen running closely together in the right atrioventricular (AV) groove, for the rest of the course of RCA (Figure 1A–C).
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