High altitude or mountain sickness is defined when someone feels sick at high altitudes, such as in the mountains or any other altitude-related sicknesses. It is hard to determine who will be affected by altitude-sickness as there are no specific factors that compare with this susceptibility to altitude sickness. However, most people can climb up to 2500 meters (8000 feet) normally.
Generally, different people have different susceptibilities to altitude sickness. For some otherwise healthy people, Acute Mountain Sickness (AMS) can begin to appear at around 2000 meters (6,500 feet) above sea level, such as at many mountain ski resorts, equivalent to a pressure of 80 kPa. AMS is the most frequent type of altitude sickness encountered. Symptoms often manifest themselves 6-10 hours after ascent and generally subside in 1 to 2 days, but they occasionally develop into the more serious conditions. Symptoms include headache, fatigue, stomach illness, dizziness, and sleep disturbance. Exertion aggravates the symptoms.
High altitude pulmonary edema (HAPE) and cerebral edema (HACE) are the most ominous of these symptoms, while AMS, retinal hemorrhage, and peripheral edema are less severe forms of the disease. The rate of ascent, altitude attained, amount of physical activity at high altitude, as well as individual susceptibility, are contributing factors to the onset and severity of high-altitude illness.
Altitude sickness usually occurs following a rapid ascent and can usually be prevented by ascending slowly.[4] In most of these cases, the symptoms are temporary and usually abate as altitude acclimatisation occurs. However, in extreme cases, altitude sickness can be fatal.
The word “soroche” came from South America and originally meant “ore“, because of an old, incorrect belief that it was caused by toxic emanations of ores in the Andes mountains.
Headache is a primary symptom used to diagnose altitude sickness, although headache is also a symptom of dehydration. A headache occurring at an altitude above 2,400 meters (8000 feet = 76 kPa), combined with any one or more of the following symptoms, can indicate altitude sickness:
Symptoms that may indicate life-threatening altitude sickness include:
- pulmonary edema (fluid in the lungs):-
- persistent dry cough
- fever
- shortness of breath even when resting
- cerebral edema (swelling of the brain):-
- headache that does not respond to analgesics
- unsteady gait
- increased vomiting
- gradual loss of consciousness.
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