Roggen M, Cools B, Brown S, et al. - Given a wide variation in the results and outcomes of ductus arteriosus stenting, researchers investigated if ductus morphology is related to different procedural results. With ductal dependent pulmonary blood flow, 123 patients presented during an 18-year span. A retrospective evaluation of results was done depending on radiographic anatomic features of the ductus arteriosus, and classification was done as follows: Group 1: “straight” ductus arteriosus; Group 2: “intermediate” ductus arteriosus; Group 3: “vertical” ductus arteriosus; Group 4: ductus arteriosus originating from the aorta to a single lung; Group 5: ductus arteriosus originating from the innominate/subclavian artery to a single lung; Group 6: ductus arteriosus from innominate/subclavian artery to both lungs. Among 98 patients, stenting was successful in 83. Among groups, a significant difference in the success of ductal stenting was evident. Experts noted that Groups 1, 4, and 5 were “easy” with good success while complex and demanding groups included Groups 2, 3, and 6. Findings showed an impact of ductus arteriosus morphology on technique as well as it was identified as the factor that determined complexity, safety, and final result of ductus arteriosus stenting.