Patent Ductus Arteriosus (PDA)

Patent ductus arteriosus (PDA), which is more common in premature infants, is a condition in which the heart's ductus arteriosus doesn't close. The open passageway is either wide (a large PDA) or narrow (a small PDA). A large PDA is dangerous because blood flow to the lungs isn't as controlled as it should be, leading to problems with the lungs and heart.

Patent Ductus Arteriosus and Trisomy 21: Katie's Story

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