title: [Early and mid-term results of endovascular aneurysm repair for infrarenal abdominal aortic aneurysm].
abstract: OBJECTIVE
  Endovascular aneurysm repair (EVAR) of abdominal aortic aneurysms (AAA) has become a viable alternative to open surgical repair in the last decade. We report here our experience on the mid-term results of EVAR and analysis of the outcomes associated with endograft AAA repair.
  
  
  METHODS
  Between Nov 2002 and Mar 2007, 26 patients with AAA were enrolled in a single institution. Indications for EVAR included unfavorable condition of body (eg. Heart, lung, or renal dysfunction, etc) for open surgery and maximum diameter of AAA > 5.0 cm. Customized stent-grafts were Talent TM, Zenith and some of products made in China. All of the patients were followed up with ultrasonography or computed tomography angiography every 3 months first year after EVAR and every year after.
  
  
  RESULTS
  The mean (SD) follow-up was 38.8 ± 12.7 months (median, 35.0 months; range, 24 to 64 months), and no patients were lost to follow-up. All cause mortality was 15.4% (4/26), with all deaths occurring within the first 2 postoperative year; 30-day mortality was 4.1%. No patient died during the operation. Completion angiography demonstrated successful sealing in 25 of 26 patients. There was no stent occlusion of renal artery. The mid term complication were observed including 2 type I endoleak after 3 months of the operation, 2 sustained type II endoleak caused by lumber artery, 1 aneurysm of left femoral artery after 16 months of operation, 1 proximal neck dilation after 12 month of operation. The aneurysm sac size didn't increase significantly during follow time, except one of the type I endoleak.
  
  
  CONCLUSIONS
  The mid-term results of EVAR support the continued use in patients with contraindications for traditional open surgery of AAA. Close surveillance is mandatory for endoleak, especially for type I endoleak. Some proximal neck dilation can be caused by the stent-graft expansion, injury, and aortic pathological changes. Endoleak of type II can not lead to enlargement of aneurysm sac probably.
authors.affiliation: Department of Vascular Surgery, Provincial Hospital Affiliated Shandong University, Jinan 250021, China.
authors.forename: Xue-jun
authors.initials: XJ
authors.lastname: Wu
authors.forename: Xing
authors.initials: X
authors.lastname: Jin
authors.forename: Shi-yi
authors.initials: SY
authors.lastname: Zhang
authors.forename: Zhen-yue
authors.initials: ZY
authors.lastname: Chong
authors.forename: Jing-yong
authors.initials: JY
authors.lastname: Zhang
authors.forename: Dian-ning
authors.initials: DN
authors.lastname: Dong
authors.forename: Mo
authors.initials: M
authors.lastname: Wang
authors.forename: Hai
authors.initials: H
authors.lastname: Yuan
authors.forename: Yan
authors.initials: Y
authors.lastname: Sun
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D017544:Aortic Aneurysm, Abdominal / Q000601:surgery*; D019917:Blood Vessel Prosthesis Implantation; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications; D012189:Retrospective Studies; D016896:Treatment Outcome