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Stent Repair for Complex Coarctation of Aorta.

OBJECTIVES: This study sought to determine whether several anatomic or evolving characteristics of the coarctation may create challenging conditions for treatment.

BACKGROUND: Stent repair of coarctation of aorta is an alternative to surgical correction.

METHODS: We analyzed our 21-year experience in the percutaneous treatment of complex coarctation of aorta. Adverse conditions for treatment were as follow: 1) complete interruption of the aortic arch (n = 11); 2) associated aneurysm (n = 18); 3) complex stenosis (n = 30); and 4) the need for re-expansion and/or restenting (n = 21). Twenty patients (33%) belonged to more than 1 group. Ten interruptions were type A and 1 was type B. The mean length of the interrupted aorta was 9 ± 11 mm. The associated aneurysms were native in 8 patients and after previous intervention in 10 patients. Aneurysm shapes were fusiform in 8 patients and saccular in 10. The following characteristics defined complex stenosis as long diffuse stenosis, very tortuous coarctation, or stenosis involving a main branch or an unusual location. Patients previously stented at an early age, required re-expansion and/or restenting after reaching 16 ± 5 years of age.

RESULTS: Two patients had died by 1-month follow-up. The remaining 58 patients did well and were followed-up for a mean period of 10 ± 6 years. Late adverse events occurred in 3 patients (5%). All remaining patients are symptom-free, with normal baseline blood pressure. Imaging techniques revealed good patency at follow-up without associated aneurysm or restenosis. The actuarial survival free probability of all complex patients at 15 years was 92%.

CONCLUSIONS: Stent repair of complex coarctation of aorta is feasible and safe. Initial results are maintained at later follow-up.

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