<prompt> Drug used in congenital hea disease to keep PDA patentPGEiPGE2PGI2Indomethacin  <response>: Ans. is a i.e., PGE, Prostaglandin El PGE1 infusion usually effective in keeping the ductus aeriosus open before surgical intervention to reduce hypoxemia and acidemia before surgery in ductus dependent lesion like. Pulmonary atresia TOF with severe PS TOF with pulmonary atresia Transposition of great aeries with VSD and PS Indomethacin is used for ductal closure 