A case report of successful primary percutaneous coronary intervention to an occluded anomalous left main coronary artery arising from the right coronary sinus.

We present the first reported case of an occluded anomalous LMCA arising from the right coronary sinus in a patient presenting with STEMI. Rapid recognition of this congenital anomaly and selection of an appropriate guide catheter were keys to achieving timely reperfusion and a good outcome in this case.