A term neonate was cannulated for venoarterial extracorporeal life support (ECLS) via the right neck for non-postoperative junctional ectopic tachycardia. Initial echocardiogram demonstrated an echogenic strand in the transverse arch. Computed tomography angiogram confirmed arterial dissection of the right common carotid artery that extended into the proximal transverse arch. Dissection flap was repaired at the time of ECLS decannulation without cardiopulmonary bypass. Follow-up computed tomography angiogram revealed a segment of narrowing of approximately 50% of the right common carotid artery without false lumen or aneurysm.
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