11. She, too, had a condition called patent ductus arteriosus . 12. Suddenly, House realizes what is wrong with Sarah : a patent ductus arteriosus ( PDA ). 13. A patent ductus arteriosus affects approximately 4 % of infants with Down syndrome ( DS ). 14. A third improvement was a drug that prevents the ductus arteriosus from staying open, Weisman said. 15. This artery later regresses as the ductus arteriosus . 16. Patent ductus arteriosus is the most common defect. 17. Mutations in MYH11 have been described in individuals with TAAD with patent ductus arteriosus ( PDA ). 18. The lungs are perfused via extensive collaterals from the systemic arteries, and sometimes also via the ductus arteriosus . 19. The symptoms of this syndrome are ventricular septal defect, patent ductus arteriosus , small jaw, undescended testes, and webbed fingers. 20. A small vessel, the " ductus arteriosus " allows blood from the pulmonary artery to pass to the aorta.