AN UNUSUAL RIGHT CORONARY ARTERY EMERGING FROM DISTAL CIRCUMFLEX ARTERY

Introduction: Coronary artery anomalies (CAAs) affect around 1% of the general population, ranging from 0.3%-5.6% in studies on patients undergoing coronary angiography and in approximately 1% of routine autopsies. One of the rarest coronary artery anomalies is the single coronary artery (SCA). The prevalence of SCA is approximately 0.024% to 0.066% in patients who undergo coronary angiography. The SCA are asymptomatic in general. In some cases, the disease may appear with life-threatening symptoms.Case Description: A 53-year-old male was admitted to the hospital due to chest pain. He underwent coronary angiography. The angiography showed a very short left main coronary artery diving into LAD and LCX arteries in several millimeters. He had a big which had the same diameter in the distal part as the proximal part. After giving a big obtuse marginal branch, a smaller obtuse marginal branch, and a posterolateral branch, the circumflex continued to the right side of the heart with a slightly smaller diameter than the preceding parts. It was found that the patient had an anatomically different RCA, which originates from the distal circumflex artery. According to Lipton et al., our case represents an L-I type.Conclusion:A single coronary artery is commonly associated with other congenital cardiac anomalies, such as bicuspid aortic valve, coronary arteriovenous fistula, and transposition of the great arteries.SCA is a rare coronary artery anomaly. A detailed anatomical description of this anomaly will help diagnose coronary artery abnormalities.