Bjørnstad, P G Carrying out inteventional procedures, and when the arterial duct is patent. [electronic resource] - Cardiology in the young Sep 2000 - 544-5 p. digital Publication Type: Letter ISSN: 1047-9511 Subjects--Topical Terms: Cardiac Catheterization--methodsDuctus Arteriosus, Patent--diagnostic imagingHumansRadiology, Interventional--methodsRisk AssessmentSensitivity and SpecificityTreatment OutcomeUltrasonography