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Circadian variation in stroke - a prospective hospital-based study.
International Journal of Clinical Practice
|October 21, 2005
Summary
Ischaemic stroke shows a circadian pattern, peaking in the late morning. This timing is linked to cardiovascular risk factors like ischaemic heart disease and hypertension.
Area of Science:
- Neurology
- Cardiology
- Chronobiology
Background:
- Circadian variation in cardiovascular and cerebrovascular diseases is documented.
- The morning peak of ischaemic stroke may be influenced by underlying cardiovascular risk factors.
Purpose of the Study:
- To investigate the circadian pattern of ischaemic stroke onset.
- To identify associated cardiovascular risk factors for morning strokes.
Main Methods:
- Prospective observational study design.
- Analysis of stroke onset times, focusing on morning hours (6:00-12:00).
- Statistical association analysis with cardiovascular risk factors.
Main Results:
- A significant increase in ischaemic stroke onset was observed in the late morning (6:00-12:00).
- Ischaemic heart disease and hypertension were significantly associated with late morning ischaemic strokes.
Conclusions:
- Ischaemic stroke exhibits a circadian pattern with a peak in the late morning.
- Ischaemic heart disease and hypertension are associated with this morning peak, suggesting a role in stroke pathogenesis.