Right aortic arch and isolated left innominate artery from a left sided patent ductus arteriosus: a very rare aortic arch anomaly.

Malformation of the aortic arch system has been described in details by Stewart et al. in 1964. Innominate artery originating via the ductus arteriosus from the pulmonary artery is a very rare type of congenital aortic arch anomaly that has been seldomly reported. We report the case of an aortic arch anomaly revealed by a pulmonary hypertension because of left to right shunt. Surgical procedure was performed through a median sternotomy, without cardiopulmonary bypass. After section. of the ductus arteriosus, the left innominate artery was extensively dissected and mobilized to be implanted on the left side of the ascending aorta under lateral clamping.