Kim Jun
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Patent Ductus Arteriosus.  When the ductus arteriosus does not close, some oxygenated blood that should be going into circulation gets shunted back into the heart.

Patent Ductus Arteriosus. When the ductus arteriosus does not close, some oxygenated blood that should be going into circulation gets shunted back into the heart.

Patent Ductus Arteriosus

Patent Ductus Arteriosus