title: [Correlation analysis of collateral circulation and clinical locations in patients with ischemic stroke].
abstract: OBJECTIVE
  To study the correlation of compensation by collateral circulation and clinical locations in ischemic stroke cases.
  
  
  METHODS
  A total of 25 ischemic stroke cases were retrospectively analyzed. MRI (magnetic resonance imaging) and DSA (digital subtraction angiography) were performed in all cases. Each patient was found to have at least one cerebral artery occlusion by DSA. The quantity relationship between collateral circulation and ischemic stroke location was analyzed by SPSS 11.5 statistics software.
  
  
  RESULTS
  Among all cases, 46 arterial occlusions were found by chance. DSA demonstrated internal carotid artery occlusion (n = 24) and vertebral & basilar artery occlusion (n = 22). And all cases had at least one collateral circulation. Among 23 cases of single collateral circulation, there were 8 cases of single ischemic stroke locations and 15 cases of multiple ischemic stroke locations; among 23 cases of multiple collateral circulations, there were 18 cases of single ischemic stroke locations and 5 cases of multiple ischemic stroke locations.
  
  
  CONCLUSIONS
  Effective collateral circulation can be established spontaneously through multiple ways when cerebral artery occlusion takes place if an intact Wills circle is present. Multiple collateral circulations may significantly decrease the quantity of ischemic stroke locations.
authors.affiliation: Department of Neurology, Affiliated Xuanwu Hospital, Capital Medical University, Beijing 100053, China.
authors.forename: Hua-Jing
authors.initials: HJ
authors.lastname: Wang
authors.forename: Chun-Qiu
authors.initials: CQ
authors.lastname: Fan
authors.forename: Xiu-Hai
authors.initials: XH
authors.lastname: Guo
authors.forename: Qing
authors.initials: Q
authors.lastname: DU
authors.forename: Jian
authors.initials: J
authors.lastname: Wu
mesh_terms: D000328:Adult; D002545:Brain Ischemia / Q000473:pathology*; D002533:Cerebral Angiography; D002560:Cerebrovascular Circulation; D003097:Collateral Circulation; D005260:Female; D006801:Humans; D020766:Intracranial Embolism / Q000473:pathology* / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012189:Retrospective Studies; D020521:Stroke / Q000473:pathology*