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Related Experiment Videos

Circadian rhythm in acute stroke

F K Pardiwalla1, M E Yeolekar, S K Bakshi

  • 1Seth G. S. Medical college, Parel, Bombay.

The Journal of the Association of Physicians of India
|April 1, 1993
PubMed
Summary

Stroke events, including ischemic and hemorrhagic types, show a peak occurrence in the late morning and early afternoon. This circadian rhythm in stroke onset, observed in the Indian population, highlights potential windows for targeted medical intervention.

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Area of Science:

  • Neurology
  • Circadian Biology
  • Epidemiology

Background:

  • Ischemic events, such as myocardial infarction, exhibit a circadian pattern.
  • Previous studies on the circadian variation of stroke onset have yielded conflicting results.
  • Blood pressure also shows significant daily fluctuations.

Purpose of the Study:

  • To investigate the circadian variation of stroke onset in the Indian population.
  • To determine if stroke onset, including both infarct and hemorrhage, follows a predictable daily pattern.
  • To assess if hypertension influences the timing of stroke occurrence.

Main Methods:

  • A study of 182 consecutive acute stroke patients admitted within 12 hours of symptom onset.
  • Analysis of stroke onset times to identify circadian patterns.
  • Inclusion of patients with both ischemic and hemorrhagic strokes, as well as those with hypertension.

Main Results:

  • The highest frequency of stroke onset occurred between 6:01 a.m. and 2:00 p.m.
  • This circadian pattern was observed in both ischemic (infarct) and hemorrhagic stroke patients.
  • Patients with hypertension also demonstrated a similar peak in stroke onset during these hours.

Conclusions:

  • Stroke onset exhibits a significant circadian variation in the Indian population, peaking in the late morning/early afternoon.
  • Understanding these high-risk periods may allow for optimized timing of medication and interventions.
  • Further research could explore chronotherapy strategies for stroke prevention and management.

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