Ductus Arteriosus, Patent [Disease/Finding] M0006877 Patency of the Ductus Arteriosus N0000001003 Ductus Arteriosus, Patent C2184 83330001 A congenital heart defect characterized by the persistent opening of fetal DUCTUS ARTERIOSUS that connects the PULMONARY ARTERY to the descending aorta (AORTA, DESCENDING) allowing unoxygenated blood to bypass the lung and flow to the PLACENTA. Normally, the ductus is closed shortly after birth. C0013274 1021972 D004374 Ductus Arteriosus, Patent Heart Defects, Congenital [Disease/Finding]