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Article
July 1953

MANAGEMENT OF THE CARDIAC PATIENT IN A HOT AND HUMID ENVIRONMENT

AMA Arch Intern Med. 1953;92(1):1-4. doi:10.1001/archinte.1953.00240190013001
Abstract

IT HAS been noted that a hot and humid environment precipitated acute congestive heart failure in patients who are compensated sufficiently to be comfortable when at rest in bed in a comfortable environment.1 Failure was precipitated more readily if the patients were removed from a comfortable room atmosphere to a given hot and humid environment in the laboratory during the winter season than during the summer. This difference may be an expression of physiologic adjustments of acclimatization. That acclimatization is responsible for this apparent seasonal difference is supported by the well-known high fatality rates during sudden severe heat waves which occur in the cooler areas of this country and the relatively low rates in the warmer areas.2

The fact that a hot and humid environment precipitates acute congestive heart failure is not surprising when it is realized that such environmental conditions produce an extra load or stress upon

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