title: Importance of early repair of isolated abdominal aortic dissecting aneurysm.
abstract: BACKGROUND
  Since the available information on isolated abdominal aortic dissecting aneurysm (AADA) is mainly related to case reports or reports of small groups of patients, its natural history remains undetermined and there is no agreement on its optimal management. The purpose of this study is to define the features and pattern of development of this unusual entity as well as to propose criteria for treatment based on our own experience and previously published data.
  
  
  METHODS
  We retrospectively evaluated the history of 6 patients diagnosed with AADA. The patients were 5 males and 1 female. The mean age was 71 +/- 8 years (range: 61-80 years), and the mean aneurysm diameter was 54 +/- 14 mm (range: 35-70 mm). All of these patients were hypertensive (100%). History of cerebrovascular accident, ischemic heart disease, peripheral arterial disease, or diabetes mellitus was present in 1 patient, respectively. Two patients developed mycotic AADA.
  
  
  RESULTS
  Emergency operations had been performed in 3 cases, and scheduled surgical reconstruction in the remaining 3 cases. Operation consisted of aneurysmectomy and graft replacement of the diseased aortic segment in all cases. One patient treated in an emergency setting died subsequently of multisystem organ failure, but the others did well.
  
  
  CONCLUSIONS
  Symptomatic patients or patients at good risk should undergo surgical repair earlier than in the case of abdominal aortic aneurysm without dissection (AAA). Dissection in addition to an AAA will further increase the weakness of the aortic wall and the possibility of aortic rupture will become higher.
authors.affiliation: Department of Cardiovascular Surgery, Hokkaido University School of Medicine, Japan.
authors.forename: J
authors.initials: J
authors.lastname: Flores
authors.forename: T
authors.initials: T
authors.lastname: Kunihara
authors.forename: N
authors.initials: N
authors.lastname: Shiiya
authors.forename: K
authors.initials: K
authors.lastname: Yoshimoto
authors.forename: K
authors.initials: K
authors.lastname: Matsuzaki
authors.forename: M
authors.initials: M
authors.lastname: Nakamura
authors.forename: F
authors.initials: F
authors.lastname: Okamoto
authors.forename: K
authors.initials: K
authors.lastname: Nakanishi
authors.forename: J
authors.initials: J
authors.lastname: Matano
authors.forename: A
authors.initials: A
authors.lastname: Yamada
authors.forename: R
authors.initials: R
authors.lastname: Maruyama
authors.forename: K
authors.initials: K
authors.lastname: Sakai
authors.forename: K
authors.initials: K
authors.lastname: Yasuda
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000784:Aortic Dissection / Q000150:complications / Q000000981:diagnostic imaging* / Q000601:surgery*; D000792:Angiography; D017544:Aortic Aneurysm, Abdominal / Q000150:complications / Q000000981:diagnostic imaging* / Q000601:surgery*; D001019:Aortic Rupture / Q000209:etiology / Q000517:prevention & control*; D004632:Emergency Medical Services / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012189:Retrospective Studies; D018570:Risk Assessment / Q000379:methods*; D012307:Risk Factors; D016896:Treatment Outcome