title: Expansion pattern and risk of rupture of abdominal aortic aneurysms that were not operated on.
abstract: OBJECTIVE
  To analyse the outcome of selective management of patients with abdominal aortic aneurysms, the expansion patterns of the aneurysms, and the factors that influenced the rate of rupture.
  
  
  METHODS
  Retrospective study.
  
  
  METHODS
  Malmö General Hospital, Lund University, Malmö, Sweden.
  
  
  METHODS
  155 patients (96 men and 59 women) with abdominal aortic aneurysms who were not selected for operation for whatever reason were included in the study immediately after their first ultrasound scan.
  
  
  METHODS
  Mortality, expansion rate (mm/year) measured on ultrasound scan, and rate of rupture of aneurysm.
  
  
  RESULTS
  Median aneurysmal diameter was 40 mm (range 20-80), and length (n = 106) 70 (range 28-140). The patients were followed up for a median of 3.4 years (range 0-10.2). A total of 107 patients died and in 21 the aneurysms ruptured (4 were operated on and survived). Thirteen patients were re-evaluated and operated on electively. Ultrasonography was repeated in 98 patients, the median expansion rates (mm/year) were 3.1 (diameter) and 1.9 (length). There was a significant linear relationship between initial size (diameter and length) and rate of expansion of diameter. The risk of rupture was greater in larger aneurysms that were expanding more quickly. The cumulative mortality was not affected by the 21 aneurysms that ruptured.
  
  
  CONCLUSIONS
  Selective management of patients with aortic aneurysms is justified.
authors.affiliation: Department of Surgery, Malmö General Hospital, Lund University, Sweden.
authors.forename: H
authors.initials: H
authors.lastname: Bengtsson
authors.forename: D
authors.initials: D
authors.lastname: Bergqvist
authors.forename: O
authors.initials: O
authors.lastname: Ekberg
authors.forename: J
authors.initials: J
authors.lastname: Ranstam
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D017544:Aortic Aneurysm, Abdominal / Q000150:complications / Q000401:mortality / Q000473:pathology / Q000601:surgery*; D001019:Aortic Rupture / Q000209:etiology* / Q000401:mortality; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012044:Regression Analysis; D012189:Retrospective Studies; D012307:Risk Factors; D015996:Survival Rate; D016896:Treatment Outcome