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Sixty children in this series underwent pulmonary artery banding (PAB); isolated ventricular septal defect (VSD) was present in 24, and 20 were corrected seven months to ten years and eight months after PAB. Other anomalies were present in 37, and 15 were eventually totally corrected. Survival after PAB was 90% (95.8% with isolated VSD), and 94.3% (95% with isolated VSD) after total correction. Mean age at banding was 12.9 months, and 52.6 months at debanding. All patients underwent catheterization before PAB; 39 underwent catheterization after PAB, and ten after total correction. Pulmonary artery blood pressure was reduced from 53.5 mm Hg to 25.3 mm Hg by banding. Most patients had only moderately increased pulmonary blood flow. Banding at the altitude of Denver (1,600 m) appears to be an effective means to convert high-risk infants into lower-risk children for total correction. The cumulative mortality for two-stage treatment of VSD was 8.3%.