Coronary artery anomalies are anatomical differences seen in approximately 1% of the population, and patients with this condition are mostly asymptomatic. The anomalous origin of the left circumflex artery from the right sinus of valsalva is one of the most common type of anomalies. The type B of this anomaly is relatively rare. There may be a difficulties in visualizing these abnormal vessels by catheter angiography. In this case, we observed an abnormal left circumflex artery that was not previously diagnosed by catheter angiography.
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