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Patent ductus arteriosus (PDA) is a persistent opening between two major blood vessels leading from the heart. The opening, called the ductus arteriosus, is a normal part of a baby's circulatory system before birth that usually closes shortly after birth.
Patent ductus arteriosus (PDA) occurs when the ductus arteriosus fails to close normally soon after birth. This condition leads to abnormal blood flow through the heart and can lead to very low oxygen levels. PDA is a very serious birth defect that can lead to congenital heart failure. Signs and Symptoms If the condition is slight, most signs and symptoms of PDA can go