title: Vasospasm and thrombus formation as possible mechanisms of stroke related to alkaloidal cocaine.
abstract: BACKGROUND
  "Crack" cocaine (alkaloidal cocaine) induces ischemic stroke. However, the mechanisms by which this occurs are not well documented in humans. We present pertinent information on three patients whose ischemic strokes involved the territory of the internal carotid artery and were associated with crack use.
  
  
  METHODS
  These patients were investigated clinically, radiologically, intraoperatively, and/or histopathologically at the same institution, and the diagnostic evaluations did not reveal a definite cardiac or hematologic cause of stroke. Large filling defects were noted on conventional carotid angiography in two of these patients; in the third patient, the histopathological changes were compatible with vasospasm. To our knowledge, these changes have not been previously documented in human arteries.
  
  
  CONCLUSIONS
  We suggest that some brain infarcts among crack cocaine users may result from vasospasm of large arteries and secondary intravascular thrombosis.
authors.affiliation: Department of Neurology, Henry Ford Hospital, Detroit, Mich. 48202-2689, USA.
authors.forename: J P
authors.initials: JP
authors.lastname: Konzen
authors.forename: S R
authors.initials: SR
authors.lastname: Levine
authors.forename: J H
authors.initials: JH
authors.lastname: Garcia
mesh_terms: D000328:Adult; D002343:Carotid Artery, Internal / Q000000981:diagnostic imaging; D002533:Cerebral Angiography; D002544:Cerebral Infarction / Q000000981:diagnostic imaging / Q000209:etiology; D002561:Cerebrovascular Disorders / Q000139:chemically induced* / Q000000981:diagnostic imaging / Q000503:physiopathology*; D016578:Crack Cocaine / Q000009:adverse effects*; D005260:Female; D006801:Humans; D002542:Intracranial Embolism and Thrombosis / Q000139:chemically induced / Q000503:physiopathology* / Q000601:surgery; D002546:Ischemic Attack, Transient / Q000139:chemically induced / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed
chemical_list: D016578:Crack Cocaine