Talbot and Michelson1 have recently reported studies bearing on the etiology of heat cramps. The subjects were men employed in the construction of the Hoover dam in Nevada, who, in the course of their work, were exposed to the extreme summer heat of the Colorado River basin desert. The symptoms varied from vomiting and dizziness to mild and severe cramps in the muscles of the legs, arms and abdomen and were associated in all cases with profuse sweating. Similar observations have been made by others on miners, iron workers and stokers laboring under much the same working conditions.
In the present instance, the subjects were seen soon after entering the hospital and a sample of venous blood was obtained before any treatment had been instituted. Both chemical analysis and morphologic examination of the blood were carried out and certain analyses of the urine also were made. The most striking
ETIOLOGY OF HEAT CRAMPS. JAMA. 1933;101(6):450. doi:10.1001/jama.1933.02740310034012
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