title: A systematic review on outcome after stenting for intracranial atherosclerosis.
abstract: OBJECTIVE
  Angioplasty and stenting is increasingly being used for the treatment of intracranial stenoses. Based on a literature search (01/1998 to 04/2008) we sought to determine the immediate and long-term outcomes, as well as the durability of this procedure.
  
  
  RESULTS
  We identified 31 studies dealing with 1177 procedures, which had mainly been performed in patients with a symptomatic (98%) intracranial high-grade stenosis (mean: 78+/-7%) at high technical success rates (median: 96%; interquartile range [IQR]: 90% to 100%). The periprocedural minor or major stroke and death rates ranged from 0% to 50% with a median of 7.7% (IQR: 4.4% to 14.3%). Periprocedural complications were significantly higher in the posterior versus the anterior circulation (12.1%, versus 6.6%, P<0.01, odds ratio [OR]: 1.94, 95% confidence interval [CI]: 1.21 to 3.10), but did not differ between patients treated with a balloon-mounted (n=906) versus those who had been treated with a self-expandable stent (n=271; 9.5% versus 7.7%, P=0.47, OR: 1.15, CI:0.76 to 2.05). Restenosis >50% occurred more frequently after the use of a self-expandable stent (16/92; 17.4%, mean follow-up time: 5.4 months) than a balloon-mounted stent (61/443; 13.8%, mean follow-up time: 8.7 months; P<0.001, log-rank test).
  
  
  CONCLUSIONS
  Although intracranial stenting appears to be feasible, adverse events vary widely. Against the background of the results of this review yielding a high rate of restenoses and no clear impact of new stent devices on outcome, the widespread application of intracranial stenting outside the setting of randomized trials and in inexperienced centers currently does not seem to be justified.
authors.affiliation: Department of Neurology, University of Göttingen, Göttingen, Germany.
authors.forename: Klaus
authors.initials: K
authors.lastname: Gröschel
authors.forename: Sonja
authors.initials: S
authors.lastname: Schnaudigel
authors.forename: Sara M
authors.initials: SM
authors.lastname: Pilgram
authors.forename: Katrin
authors.initials: K
authors.lastname: Wasser
authors.forename: Andreas
authors.initials: A
authors.lastname: Kastrup
mesh_terms: D000368:Aged; D017130:Angioplasty; D050197:Atherosclerosis / Q000601:surgery*; D002561:Cerebrovascular Disorders / Q000601:surgery*; D003627:Data Interpretation, Statistical; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D015607:Stents; D016896:Treatment Outcome