Abnormal pulmonary vasoconstriction in the newborn.
D006331:Heart Diseases / Q000150:complications; D006801:Humans; D007231:Infant, Newborn; D011652:Pulmonary Circulation; D012127:Respiratory Distress Syndrome, Newborn / Q000503:physiopathology* / Q000628:therapy; D014666:Vasomotor System / Q000502:physiology*