title: Early outcomes of endovascular aneurysm repair for abdominal aortic aneurysm: first preliminary report of national hospital organization network study in Japan.
abstract: OBJECTIVE
  
  
  
  METHODS
  In order to assess the early outcomes of endovascular aneurysm repair (EVAR) for abdominal aortic aneurysm (AAA) in the Japanese population, a total of 183 patients who had EVAR at eight medical centers of the National Hospital Organization were retrospectively reviewed and registered. The mean number of registered cases in each center was 23 ± 17 (4-50 cases). Patient characteristics were male sex, 84%; mean age, 77 years; age ≥ 80 years, 40%.
  
  
  RESULTS
  In-hospital mortality was one case (0.5%). Endoleaks were observed at the end of the procedure in 35 patients (19%: type I: n = 4, II: n = 22, III, n = 3, IV: n = 6). Early morbidity included delayed wound healing or infection (n = 7), deterioration of renal dysfunction (n = 3), stroke (n = 2), postoperative bleeding (n = 2), gastrointestinal complications (n = 2), and peripheral thromboembolism (n = 2). Eleven late deaths included one of unknown cause and six cardiovascular causes at a mean follow up of 1.0 year. Survival rates of freedom from all causes of death and from aneurysm-related death at one year were 95.4% ± 1.7% and 99.5% ± 0.5%, respectively.
  
  
  CONCLUSIONS
  Although registered patients carry a variety of risks, early outcomes were satisfactory. EVAR is an acceptable alternative treatment modality for treating AAA.
authors.affiliation: Affiliations of participants in National Hospital Organization Network Study Group in Japan for Abdominal Aortic Aneurysm are listed in Appendix.
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Handa
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Onohara
authors.forename: Keiichi
authors.initials: K
authors.lastname: Akaiwa
authors.forename: Jyunichi
authors.initials: J
authors.lastname: Kei
authors.forename: Minoru
authors.initials: M
authors.lastname: Okamoto
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Shimoe
authors.forename: Mikizou
authors.initials: M
authors.lastname: Nakai
authors.forename: Masahiro
authors.initials: M
authors.lastname: Okada
authors.forename: Toshiki
authors.initials: T
authors.lastname: Takahashi
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Suhara
authors.forename: Fuminari
authors.initials: F
authors.lastname: Kasashima
authors.forename: Masamitsu
authors.initials: M
authors.lastname: Endo
authors.forename: Takeshi
authors.initials: T
authors.lastname: Nishina
authors.forename: Tadashi
authors.initials: T
authors.lastname: Furuyama
authors.forename: Yoichirou
authors.initials: Y
authors.lastname: Ueno
keywords: Key words endovascular aneurysm repair; abdominal aortic aneurysm; multicenter study
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