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Altitude sickness, the mildest form being acute mountain sickness (AMS), is a harmful effect of high altitude, caused by rapid exposure to low amounts of oxygen at high elevation. [ 1 ] [ 2 ] [ 3 ] People's bodies can respond to high altitude in different ways.
The hiker that called search and rescue also suffered from altitude sickness. 80-pound dog gets extreme altitude sickness on Colorado hiking trail, rescuers say Skip to main content
A rapid depressurisation to the low pressures of high altitudes can trigger altitude decompression sickness. The physiological responses to high altitude include hyperventilation , polycythemia , increased capillary density in muscle and hypoxic pulmonary vasoconstriction–increased intracellular oxidative enzymes.
Chronic mountain sickness (CMS) is a disease in which the proportion of blood volume that is occupied by red blood cells increases (polycythaemia) and there is an abnormally low level of oxygen in the blood . CMS typically develops after extended time living at high altitude (over 2,500 metres (8,200 ft)).
High-altitude pulmonary edema (HAPE) is a life-threatening form of non-cardiogenic pulmonary edema that occurs in otherwise healthy people at altitudes typically above 2,500 meters (8,200 ft). [2] HAPE is a severe presentation of altitude sickness. Cases have also been reported between 1,500–2,500 metres or 4,900–8,200 feet in people who ...
High-altitude adaptation in humans is an instance of evolutionary modification in certain human populations, including those of Tibet in Asia, the Andes of the Americas, and Ethiopia in Africa, who have acquired the ability to survive at altitudes above 2,500 meters (8,200 ft). [1]
The main dangers of the mountain are those common to all high mountains, particularly altitude sickness. This can affect anyone, even those who are acclimatized. In serious cases, it can lead to high-altitude pulmonary edema and cerebral edema, which can lead to difficulties with breathing, paralysis, and death. Climbers are advised to begin ...
In 1973, Hackett was a co-founder of the Himalayan Rescue Association. It established a clinic near Everest Base Camp (which is at 5,380 m (17,700 ft)), where the sick were cared for and information was gathered about mountain sickness. In 1981, as a member of the American Research Expedition, he helped set up a "well-equipped" lab at 5,180 m ...