We report a case of anomalous course of the right coronary artery in the wall of right atrium which was encountered during coronary artery bypass surgery. As the stenotic lesion in the vessel was proximal, the large posterior descending branch of the right coronary was grafted. Such an anomalous course of the right coronary artery has not been previously described in the literature and lack of knowledge of such an abnormal course may result in inadvertant damage during cannulation of the inferior vena cava or coronary sinus.
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