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Figure 4 Proportion of patients reaching definitive repair stratified by era. The percentage of patients undergoing primary complete repair (open bars) increased significantly with increasing era, reflecting an important change in the treatment paradigm for children with pulmonary atresia associated with ventricular septal defect. The number of patients reaching repair after prior palliation (solid bars) also predictably increased with longer duration of follow-up. **p < 0.0001.