Heat stroke is a form of hyperthermia or heat-related illness, an abnormally elevated body temperature with accompanying physical symptoms including change in the nervous system function. Unlike heat cramps and heat exhaustion, two other forms of hyperthermia that are less severe, heat stroke is a true medical emergency is often fatal if not properly and promptly treated. Heat stroke is also sometimes referred to as heatstroke or sun stroke. Severe hyperthermia is defined as a body temperature
of 40℃ or higher. The body normally generates heat as a result of metabolism, and is usually able to dissipate he heat by radiation of heat through the skin or by evaporation of seat. However, in extreme heat, high humidity, or vigorous physical exertion under the sun, the body may not be able to sufficiently dissipate the heat and the body temperature rises, sometimes up to 41℃ or higher. Another cause of heat stroke is dehydration. A dehydrated person may not be able to swat fast enough to dissipate heat, which causes the body temperature to rise.
Heat stroke is not the same as stroke. “Stroke” is the general term use to describe decreased oxygen flow to an area of the brain. |