A full-term newborn develops cyanosis and tachypnea within h…
A full-term newborn develops cyanosis and tachypnea within hours after birth. Prenatal history is unremarkable. The nurse understands that the infant’s deterioration is most likely related to abnormal persistence of fetal circulation pathways that failed to close after birth.Which physiologic change at birth, if it does not occur, most directly contributes to right-to-left shunting and persistent cyanosis in a newborn with critical congenital heart disease?