Outcomes of the Arterial Switch Operation in Children Less Than 2.5 Kilograms

31 pts who underwent arterial switch at a weight of 2.5 kg or less were evaluated for outcomes.  Surgery was performed at an average of 16 days of life.  Mortality was 2.8% for those weighing 2.0-2.5 kg, and was 50% for those under 2 kg.  At a mean follow-up of 13 years, 8% had required late reoperation.  There were no late deaths, and all pts were NYHA Class I at last follow-up.