Coronary artery anomalies are congenital changes in their origin, course, and/or structure. Intercoronary communication is a very rare subset with uni- or bidirectional blood flow between two or more coronary arteries. We present the case of a 70-year-old male patient with acute coronary syndrome, and his coronary angiography incidentally showed a surprising and very rare communication between the left circumflex and right coronary arteries.
Intercoronary communication between the left circumflex and the right coronary arteries: an extremely rare coronary artery anomaly
Oliveira,Marcos Danillo Peixoto and Navarro,Ednelson Cunha and Zampier,Lis Bastos and Santos,Laura Fadel Monteiro dos and Pedroso,Isabel de Araújo and Sá,Glenda Alves de and Júnior,Hélio José Castello and Cantarelli,Marcelo José de Carvalho. Intercoronary communication between the left circumflex and the right coronary arteries: an extremely rare coronary artery anomaly. J Transcat Intervent. [online]. 2019, vol.27, [cited 2026-03-06], Available from: <https://jotci.org/article/intercoronary-communication-between-the-left-circumflex-and-the-right-coronary-arteries-an-extremely-rare-coronary-artery-anomaly/>. ISSN . http://doi.org/10.31160/JOTCI201927A20180008.
Oliveira,Marcos Danillo Peixoto; Navarro,Ednelson Cunha; Zampier,Lis Bastos; Santos,Laura Fadel Monteiro dos; Pedroso,Isabel de Araújo; Sá,Glenda Alves de; Júnior,Hélio José Castello; Cantarelli,Marcelo José de Carvalho. Intercoronary communication between the left circumflex and the right coronary arteries: an extremely rare coronary artery anomaly. J Transcat Intervent., v.27, May. 2019. Available from: <https://jotci.org/article/intercoronary-communication-between-the-left-circumflex-and-the-right-coronary-arteries-an-extremely-rare-coronary-artery-anomaly/>. acess on 06 Mar. 2026. http://doi.org/10.31160/JOTCI201927A20180008.
Oliveira,Marcos Danillo Peixoto, & Navarro,Ednelson Cunha, & Zampier,Lis Bastos, & Santos,Laura Fadel Monteiro dos, & Pedroso,Isabel de Araújo, & Sá,Glenda Alves de, & Júnior,Hélio José Castello, & Cantarelli,Marcelo José de Carvalho. (2019). Intercoronary communication between the left circumflex and the right coronary arteries: an extremely rare coronary artery anomaly. J Transcat Intervent., 27, http://doi.org/10.31160/JOTCI201927A20180008.
OliveiraMarcos Danillo Peixoto, NavarroEdnelson Cunha, ZampierLis Bastos, SantosLaura Fadel Monteiro dos, PedrosoIsabel de Araújo, SáGlenda Alves de, JúniorHélio José Castello, CantarelliMarcelo José de Carvalho. Intercoronary communication between the left circumflex and the right coronary arteries: an extremely rare coronary artery anomaly. J Transcat Intervent. [Internet]. 2019 May [cited 2026 Mar 06]; 27: Available from: https://jotci.org/article/intercoronary-communication-between-the-left-circumflex-and-the-right-coronary-arteries-an-extremely-rare-coronary-artery-anomaly/. http://doi.org/10.31160/JOTCI201927A20180008.
Video 3
Contrast injection in the left coronary artery showing the retrograde filling of the right coronary artery and its branches, with a bidirectional flow pattern.
