Herrick NL, Courelli A, Lee JW, Ratnayaka K, et al. Infants with pulmonary atresia intact ventricular septum who require balloon
atrial septostomy have significantly higher 18-month mortality. Cardiol Young 2021 Mar 1:1-6. doi: 10.1017/S1047951121000640.
PMID: 33641693