Objective: The aim of this survey was to determine Canadian vascular surgeons' experience with elective endovascular aortic repair (EVAR) and traditional open repair and their interest in participating in an ex- pertise-based randomized controlled trial (RCT) as opposed to a conventional RCT comparing these 2 procedures. Methods: A single-page questionnaire was developed and sent by fax, email or post to all vascular surgeons in Canada. Nonresponders were recontacted on 2 additional occasions to improve the response rate. The questionnaire had 2 sections. The first inquired about current and past practice pat- terns, including experience in both open and endovascular techniques. The second investigated the sur- geons' belief in the value of open as opposed to endovascular repair and the value of expertise-based RCT methodology; it also canvassed their interest in participating in a future trial. Definitions of expertise in open and endovascular repair were drawn from the published literature. Criteria to determine the feasibil- ity of conducting an expertise-based RCT were established a priori. Results: The questionnaire was sent to 259 surgeons who appeared in multiple vascular surgery databases, and the overall response rate was 56% (95% confidence interval [CI] 50%–62%). The mean career experience was 406 cases (standard devi- ation [SD] 359) for conventional open abdominal aortic aneurysm (AAA) repair and 24 cases (SD 48) for endovascular repair. Of the responding surgeons, 51% (95% CI 41%–60%) ranked conventional open repair as “probably superior.” Respondents were equally interested in participating in an RCT using ei- ther expertise-based methodology (54%, 95% CI 44%–63%) or conventional design (51%, 95% CI 41%–60%). Conclusion: Uncertainty exists among vascular surgeons in Canada as to the role of endovas- cular surgery in the repair of AAA. A national RCT comparing open with endovascular repair in the elec- tive setting is potentially feasible with either expertise-based or conventional design. Increases in the number of surgeons who are willing to participate and have expertise in EVAR, in addition to high re- cruitment rates among eligible patients, will be necessary to make such a trial feasible in Canada.