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A condition of elevated body temperature.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



the accumulation of excess heat in the body of humans or animals, with an elevation of body temperature, caused by external factors that hinder the transfer of heat to the external environment or increase heat intake from outside the body. Hyperthermia arises when there is maximum strain on the physiological mechanisms of thermoregulation (perspiration, dilation of cutaneous blood vessels, and so forth); if the causes are not removed, it progresses, ending with heat stroke at a body temperature of approximately 41°-42° C.

Hyperthermia is accompanied by an increase of metabolism and qualitative disturbances of it, loss of water and salts, and disruption of blood circulation and the delivery of oxygen to the brain, causing agitation and sometimes convulsions and fainting. High temperature during hyperthermia is tolerated less readily than it is in other feverish diseases. The development of hyperthermia is promoted by an increase in heat production (for example, during muscular work), disruption of thermoregulation mechanisms (with narcosis, drunkenness, and certain diseases), or age-related failure of these mechanisms (in very young children). Artificial hyperthermia is used in treating certain nervous and slowly progressing chronic diseases.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
While long-duration travel and hyperthermal balneotherapy are the most likely causes of PFMS in our patient, diabetic ketoacidosis (6) and streptococcal infections (3) have been suggested in other cases.
Archibald, S.B., Johnson, K.R., Mathewes, R.W., and Greenwood, D.R., 2011, Intercontinental dispersal of giant thermophilic ants across the Arctic during early Eocene hyperthermals: Proceedings of the Royal Society B, Biological Sciences, v.
stearothermophilus GRE1, newly isolated from a hyperthermal spring in Ethiopia (Haki and Rakshit, 2003b, 2004), was used in this study.
Natural mineral waters from Dax and its surroundings (France) present hot temperatures, named hyperthermal waters, ranging from 54 to 62 [degrees]C.
A team, led by the Scripps Institution of Oceanography at the University of California, San Diego, said that releases of carbon dioxide sequestered in the deep oceans were the most likely trigger of these ancient 'hyperthermal' events.
The ACEX identified the well-known PETM hyperthermal, analysis of which revealed high surface water temperatures (~24[degrees]C) and an extremely wet climate, in contrast to the Arctic of today, which has a cold desert climate (Sluijs et al.
The algal activty was also contributed on travertine depositing.Physico-chemical properties of the water: These thermal spring waters are described as hyperthermal mineral water according to the physical classification.
Bowen, G.J., Bralower, T.J., Delaney, M.L., Dickens, G.R., Ketly, D.C., Koch, P.L., Kump, L.R., Meng, J., Sloan, L.C., Thomas, E., Wing, S.L., and Zachos, J.C., 2006, Eocene hyperthermal event offers insight into greenhouse warming: EOS, Transactions of the American Geophysical Union, v.

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