Anomalous origin of the left circumflex coronary artery (LCx) from the right pulmonary artery (PA) is an extremely rare coronary anomaly. Although the clinical course may be silent, the risk of sudden cardiac death is increased. The symptoms are related to collateralization and amount of myocardium that it supplies, and some patients need surgical treatment.,
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Anomalous Origin of the Circumflex Coronary Artery from the Right Pulmonary Artery: Diagnosis Through Cardiac CT
FariaB, CalvoL, RibeiroS, RuivoC, LourençoA. Anomalous Origin of the Circumflex Coronary Artery from the Right Pulmonary Artery: Diagnosis Through Cardiac CT. Arq. Bras. Cardiol. 2021;117(1 Supl. 1):8-11.
Faria,Bebiana; Calvo,Lucy; Ribeiro,Sílvia; Ruivo,Catarina; Lourenço,António. Anomalous Origin of the Circumflex Coronary Artery from the Right Pulmonary Artery: Diagnosis Through Cardiac CT. Arq. Bras. Cardiol., v. 117, n. 1 Supl. 1, p. 8-11, Jul. 2021.
Faria,B., Calvo,L., Ribeiro,S., Ruivo,C., & Lourenço,A. (2021). Anomalous Origin of the Circumflex Coronary Artery from the Right Pulmonary Artery: Diagnosis Through Cardiac CT. Arq. Bras. Cardiol.,117(1 Supl. 1), 8-11.
Faria,Bebiana and Calvo,Lucy and Ribeiro,Sílvia and Ruivo,Catarina and Lourenço,António. Anomalous Origin of the Circumflex Coronary Artery from the Right Pulmonary Artery: Diagnosis Through Cardiac CT. Arq. Bras. Cardiol. [online]. 2021, vol. 117, n. 1 Supl. 1, [cited 2025-09-07], pp.8-11. Available from: <https://abccardiol.org/en/article/anomalous-origin-of-the-circumflex-coronary-artery-from-the-right-pulmonary-artery-diagnosis-through-cardiac-ct/>. ISSN 0066-782X.
Figure 1
Multislice cardiac CT using a 64-slice scanner showing anomalous origin of the circumflex coronary artery from the right pulmonary artery (arrow). LCx: left circumflex coronary artery; LAD: left anterior descending artery; RPA: right pulmonary artery; Ao: aorta; RCA: right coronary artery; OM1: first obtuse marginal.