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A Preclinical Model of Exertional Heat Stroke in Mice
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Health Risks and Interventions in Exertional Heat Stress.

Dieter Leyk1, Joachim Hoitz, Clemens Becker

  • 1Bundeswehr Institute for Preventive Medicine; German Sport University Cologne; Bundeswehr Hospital Hamburg; Department of Geriatrics and Geriatric Rehabilitation at the Robert-Bosch-Hospital Stuttgart; Bundeswehr Hospital Koblenz; Institute and Policlinic for Occupational Medicine, Environmental Medicine and Prevention Research, University of Cologne.

Deutsches Arzteblatt International
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Heat waves and physical exertion can cause heat illness. Rapid cooling is crucial for heat stroke treatment, but prevention through acclimatization and reduced exposure is most effective.

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Area of Science:

  • Environmental Health
  • Physiology
  • Public Health

Background:

  • Climate change is increasing the frequency of heat waves, leading to significant annual heat-related deaths in Europe.
  • Heat stress and illness result from high ambient temperatures combined with physical exertion, which elevates internal heat production.
  • Exertional heat stress occurs when the body cannot dissipate sufficient heat, posing a significant health risk.

Purpose of the Study:

  • To review the contributing factors, identify at-risk populations, and outline the diagnosis and treatment of heat illnesses.
  • To provide an overview of heat stress mechanisms and management strategies in the context of increasing global temperatures.
  • To highlight the importance of timely intervention and preventative measures for heat-related health events.

Main Methods:

  • A selective literature search was conducted using PubMed.
  • Current guidelines and expert recommendations were incorporated into the review.
  • Synthesis of information on heat stress factors, risk groups, and clinical management.

Main Results:

  • Heat production from muscle activity, combined with factors like clothing, acclimatization, and individual health status, contributes to heat stress.
  • Reduced heat loss due to clothing insulation and physiological factors increases risk.
  • Factors such as overweight, low fitness, dehydration, and certain medications decrease heat tolerance, with children and older adults being particularly vulnerable.

Conclusions:

  • Rapid cooling is the only causal treatment for heat stroke, aiming to reduce core body temperature below 40°C within 30 minutes.
  • Preventative measures, including acclimatization, minimizing heat exposure, and ceasing strenuous activity, are more effective than treatment.
  • Prompt diagnosis and immediate cooling interventions are critical for managing heat stroke and preventing fatalities.