SCMC Persistent ductus Arteriosus The Pda in the preterm infant is due to a weak vasoconstrictor response to O2 and should be considered a normal not pathologic response This pda may still need surgical correction o a left to right shunt through the ductus can flood the lungs of the premature infant prolonging mechanical ventilation, eventually leading to pulmonary edema right sided heart failurePersistent Ductus Arteriosus The PDA in the preterm infant is due to a weak vasoconstrictor response to O2 and should be considered a normal not pathologic response ⚫ This PDA may still need surgical correction ⚫ A left to right shunt through the ductus can flood the lungs of the premature infant prolonging mechanical ventilation, eventually leading to pulmonary edema & right sided heart failure