title: Predicting outcome in acute stroke: a comparison between QEEG and the Canadian Neurological Scale.
abstract: OBJECTIVE
  To determine and compare the predictive value of quantitative EEG (QEEG) and the Canadian Neurological Scale (CaNS), in patients with an acute cerebral stroke.
  
  
  METHODS
  Twenty-eight patients were studied with the diagnosis of acute ischemic middle cerebral artery stroke, within the first 72 hours of clinical evolution. Thirty-seven EEGs and clinical evaluations were collected: 13 during the first 24 hours after stroke onset, 9 between 24-48 hours and 15 between 48-72 hours. The QEEG studied variables were: the Z values (maximum, minimum and the Z medians from the 5 nearest points to each one) of absolute energies (AE) from the 4 classic frequencies bands. The clinical scale showed a smaller percent of correct prognosis than QEEG variables.
  
  
  CONCLUSIONS
  QEEG was demonstrated to be a powerful tool to predict the degree of residual functional disabilities after an acute ischemic stroke and showed a higher prognostic value than CaNS when they are performed within the first 72 hours of brain infarct.
authors.affiliation: Institute of Clinical Neurophysiology, Havana, Cuba.
authors.forename: E
authors.initials: E
authors.lastname: Cuspineda
authors.forename: C
authors.initials: C
authors.lastname: Machado
authors.forename: E
authors.initials: E
authors.lastname: Aubert
authors.forename: L
authors.initials: L
authors.lastname: Galán
authors.forename: F
authors.initials: F
authors.lastname: Llopis
authors.forename: Y
authors.initials: Y
authors.lastname: Avila
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D004569:Electroencephalography; D005260:Female; D006305:Health Status Indicators; D006801:Humans; D008297:Male; D008875:Middle Aged; D017063:Outcome Assessment, Health Care; D011379:Prognosis; D020521:Stroke / Q000175:diagnosis* / Q000503:physiopathology