title: Some chronobiological characteristics of cerebral strokes.
abstract: BACKGROUND
  The chronobiological studies of cerebro-vascular diseases, including acute cerebro-vascular incidents are scanty.
  
  
  METHODS
  The authors study retrospectively the case histories of 352 patients with CS and lethal outcome during a 5-year period /1991-1995/. The data was analyzed statistically by determining percentages and standard errors and using graphical analysis.
  
  
  RESULTS
  The peaks of mortality rate of cerebral stroke coincide with that of the incidence rate. The onset of ICS is most frequently in the hour intervals 8-12 and 14-17 o'clock, while of HCS--8-12 o'clock. The lethal outcome from ICS is predominantly in the hour interval 5-7 o'clock, while of HCS--4-9 o'clock.
  
  
  CONCLUSIONS
  The hour of onset and the hour of death from ischemic and hemorrhagic cerebral stroke have discrepant peak hours.
authors.affiliation: Department of Neurology, Higher Medical Institute, Plovdiv, Bulgaria.
authors.forename: T
authors.initials: T
authors.lastname: Markova
authors.forename: T
authors.initials: T
authors.lastname: Vasileva
authors.forename: V
authors.initials: V
authors.lastname: Naidenov
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002909:Chronobiology Phenomena; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D020521:Stroke / Q000453:epidemiology* / Q000503:physiopathology