Registry to Evaluate INOmax in Newborn Babies With Pulmonary Hypertension

Pulmonary hypertension is high blood pressure in the arteries to the lungs. It is a serious condition. It causes the blood vessels that carry blood from the heart to the lungs to become hard and narrow. When this happens, the heart has to work harder to pump the blood through. Some babies are born with pulmonary hypertension (PH). Doctors might use INOmax (a gas the baby breathes) to help newborn babies (neonates) with PH. This study will use information from the records of registered babies to see how effective and safe INOmax is for treating premature and other newborn babies for up to 11 days after they are born.