What is the difference between pfo and pda?

Both congenital defe: Pfo is when the right atrium and left atrium communicate through a congenital foramen or " hole" . The passage between the 2 chambers is neccessary before birth so the baby can get oxygenated blood from its mom. When this fails to close(up to 20%), its called a patent foramen ovale.The ductus arteriosus connects the aorta and pulmonary artey . It usually closes after birth, if it doesnt its a pda.

Very different: Pfo is a patent forman ovale, a persistent opening between the two upper chambers of the heart that usually closes shortly after birth. Pda is a persistent connection. Between the aorta and pulmonary artery which also closes shortly after birth. These changes facilitate the transition from intrauterine life to extra uterine life.