PDA (patent ductus arteriosus) device closure

The ductus arteriosus is a normal fetal artery connecting the aorta and the main lung artery (pulmonary artery). The ductus allows blood to detour away from the lungs before birth.

Every baby is born with a ductus arteriosus. After birth, the opening is no longer needed and it usually narrows and closes within the first few days.

Sometimes, the ductus doesn't close after birth. Failure of the ductus to close is common in premature infants but rare in full-term babies. In most children, the cause of PDA isn't known. Some children can have other heart defects along with the PDA.

If the PDA is small, it won't cause symptoms because the heart and lungs don't have to work harder. The only abnormal finding may be a distinctive type of murmur (noise heard with a stethoscope).

If the PDA is large, the child may breathe faster and harder than normal. Infants may have trouble feeding and growing at a normal rate. Symptoms may not occur until several weeks after birth. High pressure may occur in the blood vessels in the lungs because more blood than normal is being pumped there. Over time this may cause permanent damage to the lung blood vessels.