title: Safety and feasibility of balloon-expandable stent implantation for the treatment of type I endoleaks following endovascular aortic abdominal aneurysm repair.
abstract: OBJECTIVE
  The occurrence of type I endoleaks represent an ominous sign after endovascular aneurysms repair (EVAR). We report our experience using balloon-expandable stents (BES) for the treatment of proximal Type I endoleaks at five high-volume hospitals in Argentina.
  
  
  RESULTS
  Of 1,395 patients who underwent EVAR, we retrospectively collected data of 29 (2%) consecutive patients who underwent additional BES to repair proximal type I endoleaks. The mean age was 75.8 years old (range 63-87) and 93% were male. A hostile anatomy was found in 89.6% of the cases. BES oversize (balloon/neck diameter ration ≥ 30%) was frequent (69%); whereas, BES/prosthesis diameter ratio was less than 1 in 79% of the cases. Complete and partial sealing was obtained 72 and 28% of the cases, respectively. There were no immediate or late surgical conversion or major complications related with stent implantation. At a median time follow-up of 14.9 months (25-75% interquartiles: 4.5-17.5 months), there were no cardiovascular deaths, evidence of aneurysm sac enlargement or need for re-intervention.
  
  
  CONCLUSIONS
  Our preliminary results suggest that BES implantation for the treatment of proximal type I endoleaks is feasible and safe with favourable mid-term results and may preclude the need for surgical conversion.
authors.affiliation: Servicio de Hemodinamia e Intervenciones por Cateterismo, Sanatorio Allende, Córdoba, Argentina.
authors.forename: Hugo
authors.initials: H
authors.lastname: Londero
authors.forename: Gustavo
authors.initials: G
authors.lastname: Lev
authors.forename: Hernan
authors.initials: H
authors.lastname: Bertoni
authors.forename: Esteban
authors.initials: E
authors.lastname: Mendaro
authors.forename: Omar
authors.initials: O
authors.lastname: Santaera
authors.forename: Leandro
authors.initials: L
authors.lastname: Martinez Riera
authors.forename: Oscar
authors.initials: O
authors.lastname: Mendiz
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D017544:Aortic Aneurysm, Abdominal / Q000000981:diagnostic imaging / Q000601:surgery*; D001027:Aortography / Q000379:methods; D001118:Argentina; D001807:Blood Vessel Prosthesis; D019917:Blood Vessel Prosthesis Implantation / Q000009:adverse effects / Q000295:instrumentation*; D002404:Catheterization; D057867:Endoleak / Q000000981:diagnostic imaging / Q000209:etiology / Q000628:therapy*; D057510:Endovascular Procedures / Q000009:adverse effects / Q000295:instrumentation*; D005240:Feasibility Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D015607:Stents; D013997:Time Factors; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome