Heat-Exercise Hyperpyrexia

Abstract
A fatal case of "heat stroke" occurring on exercise in temperate conditions is described. Possible mechanisms for increased susceptibility are discussed and attention is drawn to a possible overlap with the malignant hyperpyrexia (MH) syndrome. The second day of strenuous exercise may be a time of special risk. More frequent consideration of dantrolene treatment in heat injury is suggested and the term "heat-exercise hyperpyrexia" is proposed to replace "heat stroke" and "exertional hyperpyrexia".

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