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Repair of truncus arteriosus in the neonate.

From September 1986 through December 1991, 63 patients with truncus arteriosus underwent surgical repair. The management approach evolved over the period of the study from elective primary repair at 3 months of age to elective primary repair in the early neonatal period. Thirty variables were examined as potential risk factors for the outcome events of death, reoperation, and presence of pulmonary vascular morbidity. According to both univariate and multivariate techniques, severe truncal valve regurgitation, interrupted aortic arch, coronary artery anomalies, and age at repair greater than 100 days were important risk factors for perioperative death. In the 33 patients without these risk factors, early survival was 100%. In the 30 patients with one or more of these risk factors, survival was 63%. Pulmonary hypertensive episodes were fewer, and duration of ventilator dependence and pulmonary artery pressure were significantly less in patients undergoing the operation before 30 days of age. Seven patients required reoperation for right ventricular outflow tract obstruction at a mean follow-up time of 23.4 months, with no deaths. In conclusion, interrupted aortic arch, severe truncal valve insufficiency, coronary anomalies, and repair later than 100 days of age were risk factors for death after repair of truncus arteriosus. In the absence of these associations, truncus arteriosus can be repaired with excellent surgical outcome in the neonatal and early infancy period. Repair in the early neonatal period reduces the prevalence of postoperative pulmonary vascular morbidity.

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