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[Transaortic repair of aortopulmonary septal defect in neonate (20 days of age, 2175 gram) using profoundly hypothermic circulatory arrest].

In a 20-days old girl, aortopulmonary septal defect (total defect type) was closed by transaortic patch repair with cardiopulmonary bypass (CPB). The postoperative course was uneventful, and she was discharged 43 days later. This is the youngest and lowest-weight case ever reported in Japan. Various procedures for aortopulmonary septal defect have been proposed with or without CPB. However, transaortic repair with the aid of profoundly hypothermic circulatory arrest seems to be the most preferable corrective surgery for total defect type of neonate and low-weight infant.