Surgical repair of an aortopulmonary septal defect, interrupted aortic arch and the duct that coexists in this setting usually includes closure of the aortopulmonary septal defect, reconstruction of the arch, and interruption of the duct. A 20-month-old girl underwent a successful one-stage repair of such anomalies in which an intraarterial baffle was used. A Gore-Tex baffle was used both to close the aortopulmonary septal defect and to conduct the ascending aortic blood flow through the duct into the descending aorta. We recommend use of this intraarterial baffle as an alternative to the repair of an aortopulmonary septal defect and an interrupted aortic arch with a widely patent duct.