Long-term normal: A patent ductus arteriosus (pda) is a normal structure before birth, that allows blood pumped from the right ventricle to bypass the lungs to reach the aorta and ultimately the placenta. If the PDA stays open after birth, it can result in excess blood flow to the lungs. If necessary, the PDA can be closed by surgery or catheterization with very high levels of success and long-term good health.
Answered 1/12/2015
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