label: Grade 4 Persistent Pulmonary Hypertension of the Newborn, AE
label_lc: grade 4 persistent pulmonary hypertension of the newborn, ae
description: "A persistent pulmonary hypertension adverse event in a newborn characterized by life-threatening respiratory and/or hemodynamic compromise; extracorporeal membrane oxygenation (ECMO) required; oxygenation index greater than 40."