Location: The pfo is a hole between the upper heart chambers that likely has a flap cover it in most cases but it can be plied open. The PDA is a bypass circuit that allows the fetal blood to bypass the lungs until air breathing starts. It is physically located above & to the left of the heart & joins two main heart vessels.
Answered 1/12/2015
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Very different: Pda is a communication between aorta and pulmonary artery that allows neonatal circulation. Once born the PDA closes to allow normal extra uterine circulation. Pro is a persistent opening between upper heart chamber (atria). There are few symptoms associated with pro. A persistent PDA can have significant consequences.
Answered 1/12/2015
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