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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 It might be outdated or ideologically biased.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 ?
The fact sheet on heat-related deaths highlights the effects climate change has on such deaths and details disparities by U.S.
In Melbourne, Australia, for example, planners are working to double the city's tree canopy by 2040, an approach that will lower temperatures and reduce heat-related deaths.
In Melbourne, Australia, for example, planners are working todouble the city's tree canopyby 2040, an approach that will lower temperatures and reduce heat-related deaths.
The results indicated dramatic increases of heat-related deaths under extreme warming (3AC and 4AC) compared to the mildest threshold (1.5AC), with additional excess mortality ranging from +0.73 per cent to +8.86 per cent across all regions.
The study did not take into account measures to adapt to rising temperatures, or demographic and economic factors, but those could have an impact when it comes to reducing heat-related deaths, said lead author Ana Maria Vicedo-Cabrera.
A recent study in the journal PLOS Medicine described how the increase in frequency and severity of heatwaves would trigger a dramatic spike in heat-related deaths across the world, especially if carbon emissions are not checked.
And heat-related deaths is just part of the havoc the changing temperatures will bring.
Quebec's Public Health Department said Monday "the situation is back to normal" and that it would stop giving updates on heat-related deaths, CNN news partner CBC reported.
class="MsoNormalPublic health authorities in Quebec have made a concerted effort to improve the reporting of heat-related deaths. They have set up a special liaison program with hospitals and emergency rooms to monitor heat-related illnesses and mortality, Kaiser said, which may explain why the number of deaths seems high compared to elsewhere in the nation.
Above all, I witnessed that most people leave children in parked cars that can be fatal because the temperature in the car rise up to more than 6.7C in just 10 minutes, and this is the common cause of heat-related deaths in children.
The research indicates that rising temperatures will also lead to losses in worker productivity, increases in heat-related deaths, and worsening destruction caused by extreme weather events along the coasts.
The lawsuit cites at least 23 heat-related deaths in Texas prisons since 1998 and argues temperatures at Texas prisons routinely surpass 100 degrees.