Double right coronary artery (RCA) is an extremely uncommon anomaly that is mostly detected incidentally in patients undergoing coronary angiography. It can be a benign and isolated anomaly or associated with other congenital abnormalities, mostly other coronary anomalies. Although atherosclerosis and myocardial ischemia have been frequently reported in patients with double RCA, this likely reflects that the patients were evaluated for chest pain rather than the predisposition to atherosclerosis in double RCA. Paralleling the increased awareness of this entity and the availability of non-invasive and cost-effective imaging of the coronary arteries, the diagnosis of double RCA has increased recently. Here, we present a case of double RCA diagnosed by coronary computed tomographic angiography, and provide a mini-review on the demography, anatomic variants, and clinical significance of double RCA.
Keywords: AMB, acute marginal branch; CA, conus artery; CTA, computed tomographic angiography; Congenital coronary anomaly; Conventional coronary angiography; Coronary computed tomographic angiography; Double right coronary artery; LAD, left anterior descending; MDCT, multi-detector computed tomography; MI, myocardial infarction; PDA, posterior descending artery; RCA, right coronary artery.
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