Final answer:
The first stage of correction for pulmonary atresia is surgical repair. This congenital heart defect involves a missing or abnormal pulmonary valve, restricting blood flow to the lungs. Surgery is performed to reconstruct or replace the valve.
Step-by-step explanation:
The first stage of correction for pulmonary atresia is surgical repair. Pulmonary atresia is a congenital heart defect where the pulmonary valve is either missing or abnormally developed. In this condition, blood flow to the lungs is restricted, leading to low oxygen levels in the body. Surgery is typically performed to reconstruct or replace the pulmonary valve, allowing for proper blood flow.