title: Tube stent-grafts for infrarenal aortic aneurysm: a matched-paired analysis based on EUROSTAR data.
abstract: OBJECTIVE
  Tube stent-grafts for treatment of infrarenal aortic aneurysms (AAAs) are a nearly forgotten concept. For focal aortic pathologies tube stent-grafts may be a treatment option. We have performed a retrospective matched-paired analysis of the EUROSTAR registry regarding the outcome of tube vs. bifurcated stent-grafts for AAA. Tapered aortomonoiliac stent-grafts were not the objective of this study.
  
  
  METHODS
  From July 1997 to June 2006, 7581 patients who underwent an endovascular AAA repair were entered in the EUROSTAR registry by 164 centers. One hundred fifty-three patients were treated with tube stent-grafts. For each of these 153 patients we selected one patient from a bifurcated stent-graft group (BGG-original, 7428 patients) matched according to gender, ASA, age, AAA diameter, and type of anesthesia. Differences in preoperative details between the two study groups were analyzed using chi-square test for discrete variables and Wilcoxon rank-sum test for continuous variables. Multivariate logistic regression analysis was performed on early complications. Midterm outcomes (>30 days) were analyzed by Kaplan-Meier and multivariate Cox proportional hazard model.
  
  
  RESULTS
  The duration of the procedure was shorter in the tube stent-graft group (TGG; 102.3 +/- 52.2) than in BGG (128.3 +/- 55.0; p = 0.0002). Type II endoleak was less frequent in TGG (4.0%; mean follow-up, 23.12 +/- 23.9 months) than in BGG (14.3%; mean follow-up, 20.77 +/- 20.0 months; p = 0.0394). Type I endoleaks and migration were distributed equally, without significant differences between the groups. Combined 30-day and late mortality was higher for TGG (p = 0.0346) and was obviously not aneurysm related.
  
  
  CONCLUSIONS
  We conclude that after selection of patients, tube stent-grafts for infrarenal aortic repair can be performed with great safety regarding endoleaks and migration. The combined higher 30-day mortality and non-aneurysm-related mortality during follow-up were mainly caused by cardiac failures in our sample.
authors.affiliation: Department of Vascular and Endovascular Surgery, Klinikum Ingolstadt, Krumenauerstrasse 25, D-85049, Ingolstadt, Germany. Volker.Ruppert@med.uni-muenchen.de
authors.forename: Volker
authors.initials: V
authors.lastname: Ruppert
authors.forename: Lina J
authors.initials: LJ
authors.lastname: Leurs
authors.forename: Roel
authors.initials: R
authors.lastname: Hobo
authors.forename: Jacob
authors.initials: J
authors.lastname: Buth
authors.forename: Johannes
authors.initials: J
authors.lastname: Rieger
authors.forename: Thomas
authors.initials: T
authors.lastname: Umscheid
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D017130:Angioplasty; D017544:Aortic Aneurysm, Abdominal / Q000000981:diagnostic imaging / Q000401:mortality / Q000601:surgery*; D001027:Aortography; D001807:Blood Vessel Prosthesis; D015331:Cohort Studies; D005060:Europe; D005260:Female; D005500:Follow-Up Studies; D017052:Hospital Mortality; D006801:Humans; D008297:Male; D016555:Matched-Pair Analysis; D008875:Middle Aged; D011183:Postoperative Complications / Q000000981:diagnostic imaging; D011446:Prospective Studies; D011474:Prosthesis Design; D012042:Registries; D012189:Retrospective Studies; D015607:Stents; D016019:Survival Analysis