mountain/hypoxia

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[Mountain sickness].

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Mountaineering brings many health risks, one of which is mountain sickness. Its mildest form - acute mountain sickness - is mainly characterized by subjective symptoms (headache, loss of appetite, insomnia, weakness, nausea and rarely also vomiting). Advanced and life-threatening forms are

Acute Mountain Sickness

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As the number of international, adventure, and wilderness travelers increase, physicians in all locations and types of practices may be asked to counsel and provide prophylaxis or self-treatment for a variety of travel-related illnesses. At higher altitudes, the decreased partial pressure of oxygen

[Acute mountain sickness].

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Acute mountain sickness is a pathologic reaction as a result of bad adaptation to high altitudes (greater than 2.500 meters). The main symptoms are headache, nausea, vomits, and insomnia. When severe it can produce oliguria, retinal hemorrhage, ataxia and sometimes coma. Its etiology is not well

Exercise intensity typical of mountain climbing does not exacerbate acute mountain sickness in normobaric hypoxia.

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Physical exertion is thought to exacerbate acute mountain sickness (AMS). In this prospective, randomized, crossover trial, we investigated whether moderate exercise worsens AMS in normobaric hypoxia (12% oxygen, equivalent to 4,500 m). Sixteen subjects were exposed to altitude twice: once with

Acute mountain sickness score and hypoxemia.

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BACKGROUND Hypoxemia is the immediate consequence of hyobaric hypoxia, which is the crucial starting mechanism of acute mountain sickness (AMS). The AMS is generally a benign and self-limiting condition which can be prevented by gradual ascent. However, ascent rates recommended for prophylaxis of

Changes in hemodynamics in mountain hypoxia.

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Frontiers of hypoxia research: acute mountain sickness.

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Traditionally, scientists and clinicians have explored peripheral physiological responses to acute hypoxia to explain the pathophysiological processes that lead to acute mountain sickness (AMS) and high-altitude cerebral edema (HACE). After more than 100 years of investigation, little is yet known

Exercise pathophysiology in patients with chronic mountain sickness exercise in chronic mountain sickness.

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BACKGROUND Chronic mountain sickness (CMS) is characterized by a combination of excessive erythrocytosis,severe hypoxemia, and pulmonary hypertension, all of which affect exercise capacity. METHODS Thirteen patients with CMS and 15 healthy highlander and 15 newcomer lowlander control subjects were

[The heart and the mountains].

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In a normal subject, exposure to high altitude is accompanied by a diminution in performance that is proportional to the hypoxia. In order to advise a cardiac patient who is contemplating undertaking a physical activity in the mountains and wishes to avoid taking any unnecessary risks in an

Acute mountain sickness: increased severity in eucapnic hypoxia.

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This study examined the hypothesis that prevention of hypocapnia and alkalosis would ameliorate the symptoms of acute mountain sickness (AMS). Five subjects were exposed to simulated high altitude for 4 d with 3.8% CO2 added to the chamber to maintain normocapnia. Four other subjects were exposed

Catecholamine levels in hypoxia-lnduced acute mountain sickness.

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Enhanced sympathoadrenal activity has been implicated in the pathogenesis of acute mountain sickness (AMS). This study was designed to examine the time course of circulating catecholamines in individuals with and without AMS. METHODS Subjects were low-altitude residents (10 men, 8 women) who had not

Hypoxemia and acute mountain sickness: which comes first?

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Hypoxemia is usually associated with acute mountain sickness (AMS), but most studies have varied in time and magnitude of altitude exposure, exercise, diet, environmental conditions, and severity of pulmonary edema. We wished to determine whether hypoxemia occurred early in subjects who developed

Ventilation response to hypoxia and acute mountain sickness.

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The autonomic nervous system and hypoxia: mountain medicine.

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Pulmonary hypertension and chronic mountain sickness.

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Chronic mountain sickness is a syndrome of severe symptomatic polycythemia and hypoxemia occurring in natives or long-term high altitude sojourners. The condition may be complicated by pulmonary hypertension in proportion to decreased oxygenation, indicating hypoxic vasoconstriction and remodeling.

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