Endovascular Repair of Abdominal Aortic Aneurysm in Patients Physically Ineligible for Open Repair

EVAR Trial Investigators

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)

Abstract

Objective: The aim of the study was to compare long-term total and aneurysm-related mortality in physically frail patients with abdominal aortic aneurysm (AAA) randomized to either early endovascular aneurysm repair (EVAR) or no-intervention. Summary Background Data: EVAR-2 remains the sole randomized trial to identify whether EVAR reduces mortality in patients physically ineligible for open repair. Methods: Between September 1999 and August 2004, 404 patients from 33 centers in the United Kingdom aged ≥60 years with AAA >5.5cm in diameter were randomized 1:1 using computer-generated sequences of randomly permuted blocks stratified by center to receive either EVAR (197) or no-intervention (207). The primary analysis compared total and aneurysm-related deaths in groups until June 30, 2015 (mean, 12.0 yrs; maximum 14.1 yrs). Results: Mean follow-up until death or censoring was 4.2 years. There were 187 deaths (22.6 per 100 person-yrs) in the EVAR group and 194 (22.1 per 100 person-yrs) in the no-intervention group. By 12 years of follow-up the estimated survival was 5.3% [95% confidence interval (CI), 2.6-9.2] in the EVAR group and 8.5% (95% CI, 5.2-12.9) in the no-intervention group; there was no significant difference in life expectancy between the groups (both 4.2 yrs; P = 0.97). However, overall aneurysm-related mortality was significantly lower in the EVAR group [3.3 deaths per 100 person-yrs compared with 6.5 deaths per 100 person-yrs in the no-intervention group, adjusted hazard ratio 0.55 (95% CI, 0.34-0.91; P = 0.019)]. Patients surviving beyond 8 years were younger, with higher body mass index, estimated glomerular filtration rate, and forced expiratory volume in 1 second. Conclusions: EVAR does not increase overall life expectancy in patients ineligible for open repair, but can reduce aneurysm-related mortality.

Original languageEnglish
Pages (from-to)713-719
Number of pages7
JournalAnnals of Surgery
Volume266
Issue number5
DOIs
Publication statusPublished - 1 Nov 2017
Externally publishedYes

Bibliographical note

Publisher Copyright:
Copyright © 2017 Wolters Kluwer Health, Inc. All rights reserved.

Keywords

  • elective abdominal aortic aneurysm repair
  • patients physically ineligible for open abdominal aortic repair
  • the use of endovascular aneurysm repair (EVAR) in unfit patients

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