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[Five elderly patients with cerebral infarction seen during a heat wave]
Nihon Ronen Igakkai Zasshi. Japanese Journal of Geriatrics
|November 11, 1999
Summary
Elderly individuals are susceptible to dehydration during heat waves, which can trigger cerebral infarction (stroke). Increased water intake, especially in the morning, is crucial for preventing heat-related strokes in older adults.
Area of Science:
- Neurology
- Geriatrics
- Environmental Medicine
Context:
- Heat waves with temperatures exceeding 30°C increase stroke incidence.
- Elderly patients (> or = 65 years) are particularly vulnerable to heat-induced dehydration and stroke.
- Cerebral infarction cases rose significantly during a two-week heat wave period.
Purpose:
- To investigate the relationship between dehydration and cerebral infarction in the elderly during a heat wave.
- To analyze clinical and neuroimaging findings of elderly patients experiencing stroke during extreme heat.
- To identify preventive measures against heat-related ischemic stroke in older populations.
Summary:
- Five elderly patients (73-89 years) developed cerebral infarction during a heat wave, with dehydration identified as a key factor.
- Clinical signs included decreased skin turgor and dry tongue, with laboratory findings showing a high BUN/creatinine ratio and elevated fibrinogen.
- Atherothrombotic, lacunar, and cardioembolic infarctions were observed, with stroke onset typically occurring before noon and linked to physical activity.
- Fluid infusion improved dehydration symptoms, suggesting a direct link between heat-induced dehydration and stroke in the elderly.
Impact:
- Highlights the critical role of hydration in preventing ischemic stroke among the elderly during summer.
- Emphasizes the need for increased water intake upon waking in summer to mitigate dehydration risks.
- Provides evidence for targeted public health advisories regarding heat safety for elderly populations.