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The Japanese experience in hemorrhagic stroke

T Omae1, J Oita, K Ueda

  • 1National Cardiovascular Center, Suita, Osaka, Japan.

Journal of Hypertension. Supplement : Official Journal of the International Society of Hypertension
|December 1, 1994
PubMed
Summary

Japanese stroke mortality has significantly decreased, particularly for hemorrhagic stroke, due to lifestyle changes and better hypertension control. This shift indicates a trend towards less severe brain hemorrhage cases in recent years.

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Area of Science:

  • Neurology
  • Public Health
  • Epidemiology

Background:

  • Hemorrhagic stroke presents unique challenges in Japan.
  • Recent years have seen notable shifts in stroke incidence and severity.

Purpose of the Study:

  • To review current challenges associated with hemorrhagic stroke in Japan.
  • To investigate potential reasons for changes in hemorrhagic stroke incidence and severity.

Main Methods:

  • Analysis of mortality statistics.
  • Review of community-based stroke registries.
  • Examination of hospital records.

Main Results:

  • Age-adjusted stroke mortality in Japan declined by approximately 75% over 20 years.

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  • Hemorrhagic stroke saw a more significant reduction than ischemic stroke.
  • The incidence ratio of brain infarction to brain hemorrhage in Japan is lower than in Western populations.
  • Subarachnoid hemorrhage accounts for 7-12% of total strokes in Japan.
  • Mild to moderate brain hemorrhage cases are now more frequent than severe cases.

    • Conclusions:

    • Antihypertensive treatment and lifestyle modifications (including nutrition) are likely drivers of observed stroke figure changes.
    • The declining trend in stroke mortality and the shift in severity suggest successful public health interventions.