Patent Ductus Arteriosus (PDA) (Persistent Ductus Arteriosus) By Lee B Beerman, MD, Children's Hospital of Pittsburgh of the University of Pittsburgh School of Medicine Reviewed / Revised Apr 2023 View Patient Education Pathophysiology Symptoms and Signs Diagnosis Treatment Key Points More Information Topic Resources Patent Ductus Arteriosus... Patent ductus arteriosus Patent Ductus Arteriosus... Patent Ductus Arteriosus... Indomethacin Dosing Guidelines * Overview of Patent Ductus... Patent ductus arteriosus (PDA) is a persistence of the fetal connection (ductus arteriosus) between the aorta and pulmonary artery after birth.