Transesophageal echocardiographic diagnosis of aortic arch-left innominate vein fistula.

We present a patient with aortic arch-left innominate vein (LIV) fistula diagnosed by transesophageal echocardiography. Also, an interrupted linear echo was noted within the dilated LIV with flow signals moving across the area of interruption, suggestive of left innominate vein pseudo-aneurysm or dissection. The patient subsequently underwent successful surgical repair of the fistula.