It happens when the baby's heart doesn’t form as it should in the uterus. This can happen during the first 8 weeks of pregnancy. PA is a problem with the opening of the pulmonary valve. This valve ...
Patent ductus arteriosus, or PDA, is a heart defect that can develop soon after birth. It affects the way blood flows through a baby’s lungs. Mild PDA might not need treatment, but some children with ...