title: Changes in suprarenal and infrarenal aortic angles after endovascular aneurysm repair.
abstract: OBJECTIVE
  We investigated whether suprarenal and infrarenal aortic angles change after the endovascular aneurysm repair (EVAR) procedure and during follow-up, and investigated the correlation between infrarenal aortic angle after EVAR and type Ia endoleaks.
  
  
  METHODS
  Data collected on 70 EVAR procedures for a fusiform infrarenal aortic aneurysm performed between May 2006 and December 2012 were supplemented with a retrospective review of charts and radiographs.
  
  
  RESULTS
  The greater the preoperative infrarenal aortic angle, the greater the suprarenal aortic angle (r = 0.72, P < 0.001). The infrarenal aortic angle decreased after the EVAR procedure and continued to decrease slowly thereafter (all P < 0.001). Suprarenal aortic angle decreased immediately after the EVAR procedure and continued to decrease during the first month (P < 0.001). No differences in angulation were observed based on stent graft type. Type Ia endoleaks occurred with significantly greater incidence in patients with a larger post EVAR infrarenal angle (P = 0.037).
  
  
  CONCLUSIONS
  The infrarenal aortic angle decreased significantly immediately after the EVAR procedure and continued to decrease slowly thereafter. Suprarenal aortic angle decreased immediately after the EVAR procedure and continued to decrease during the first month. We found a correlation between infrarenal and suprarenal aortic angle. Type Ia endoleaks occurred with greater incidence in patients with a larger infrarenal angle immediately after EVAR.
authors.affiliation: Department of Surgery, Chonnam National University Medical School, Gwangju, Korea.
authors.forename: Ho Kyun
authors.initials: HK
authors.lastname: Lee
authors.affiliation: Department of Surgery, Chonnam National University Medical School, Gwangju, Korea.
authors.forename: Sang Young
authors.initials: SY
authors.lastname: Chung
authors.affiliation: Department of Radiology, Chonnam National University Medical School, Gwangju, Korea.
authors.forename: Jea Kyu
authors.initials: JK
authors.lastname: Kim
authors.affiliation: Chonnam National University Collage of Nursing, Gwangju, Korea.
authors.forename: Sung Hee
authors.initials: SH
authors.lastname: Yoo
authors.affiliation: Department of Surgery, Chonnam National University Medical School, Gwangju, Korea.
authors.forename: Soo Jin Na
authors.initials: SJ
authors.lastname: Choi
keywords: Aortic aneurysm; Endoleak; Endovascular procedures