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Herein, we present a brief case of anomalous coronary arteries mistaken to be chronic total occlusion. Since we first presumed the anomalous coronary arteries to be chronic total occlusion of the distal right coronary artery, percutaneous coronary intervention was attempted for the presumed lesion, but it failed. Before the second attempt of percutaneous coronary intervention, coronary computed tomography angiography revealed the coronary artery from the left anterior descending artery corresponding with the distal part of the right coronary artery without connection to the right coronary artery. Therefore, we recognized the patient had anomalous coronary arteries with no connection of the vascular wall between the main and distal segments of the right coronary artery. This case may give insights to the importance of meticulous examination of coronary computed tomography angiography imaging before chronic total occlusion percutaneous coronary intervention to avoid the unnecessary procedure.

Unnecessary PCI Attempt for Presumed CTO Which Was Revealed To Be Anomalous Coronary Arteries – Role of Coronary CT Angiography