. . "C84492"^^ . . "C0013274"^^ . . "NICHD"^^ . "A congenital defect characterized by the failure of the ductus arteriosus to close soon after birth. As a consequence, blood from the aorta mixes with blood from the pulmonary artery. If untreated, it may lead to congestive heart failure.NCI" . "Patent Ductus Arteriosus"^^ . "Patent Ductus Arteriosus"^^ . "Patent Ductus ArteriosusPTNICHD" . "Patent Ductus ArteriosusPTNCI" . . "Disease or Syndrome"^^ . .