Results 171 to 180 of about 150,486 (209)
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Seminars in Respiratory and Critical Care Medicine, 2023
AbstractWith ascent to high altitude, barometric pressure declines, leading to a reduction in the partial pressure of oxygen at every point along the oxygen transport chain from the ambient air to tissue mitochondria. This leads, in turn, to a series of changes over varying time frames across multiple organ systems that serve to maintain tissue oxygen ...
Marc Moritz Berger, Andrew M. Luks
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AbstractWith ascent to high altitude, barometric pressure declines, leading to a reduction in the partial pressure of oxygen at every point along the oxygen transport chain from the ambient air to tissue mitochondria. This leads, in turn, to a series of changes over varying time frames across multiple organ systems that serve to maintain tissue oxygen ...
Marc Moritz Berger, Andrew M. Luks
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Current Pain and Headache Reports, 2013
High altitude headache (HAH) has been defined by the International Headache Society as a headache that appears within 24 hours after ascent to 2,500 m or higher [1••]. The headache can appear in isolation or as part of acute mountain sickness (AMS), which has more dramatic symptoms than the headache alone.
J Ivan, Lopez +2 more
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High altitude headache (HAH) has been defined by the International Headache Society as a headache that appears within 24 hours after ascent to 2,500 m or higher [1••]. The headache can appear in isolation or as part of acute mountain sickness (AMS), which has more dramatic symptoms than the headache alone.
J Ivan, Lopez +2 more
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High-altitude retinopathy and altitude illness
Ophthalmology, 1999To determine the relationship between high-altitude retinopathy (HAR) and other altitude-related illnesses and establish a classification system for HAR.Observational case series.All 40 climbers among 3 Himalayan expeditions who ascended to altitudes between 16,000 and 29,028 feet above sea level (summit of Mt.
M, Wiedman, G C, Tabin
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Emergency Medicine Clinics of North America, 1984
Altitude illness is a group of synergistic physiologic disturbances, each of which may occur alone but which more commonly occur together, with one dominating the clinical picture. Treated promptly, altitude illness is readily reversible with full recovery; procrastination may lead to death or disability.
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Altitude illness is a group of synergistic physiologic disturbances, each of which may occur alone but which more commonly occur together, with one dominating the clinical picture. Treated promptly, altitude illness is readily reversible with full recovery; procrastination may lead to death or disability.
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Nature Reviews Disease Primers
Millions of people visit high-altitude regions annually and more than 80 million live permanently above 2,500 m. Acute high-altitude exposure can trigger high-altitude illnesses (HAIs), including acute mountain sickness (AMS), high-altitude cerebral oedema (HACE) and high-altitude pulmonary oedema (HAPE). Chronic mountain sickness (CMS) can affect high-
Gatterer, Hannes +5 more
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Millions of people visit high-altitude regions annually and more than 80 million live permanently above 2,500 m. Acute high-altitude exposure can trigger high-altitude illnesses (HAIs), including acute mountain sickness (AMS), high-altitude cerebral oedema (HACE) and high-altitude pulmonary oedema (HAPE). Chronic mountain sickness (CMS) can affect high-
Gatterer, Hannes +5 more
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The Lancet Respiratory Medicine, 2012
Medical problems occur at high altitude because of the low inspired Po(2), which is caused by the reduced barometric pressure. The classical physiological responses to high altitude include hyperventilation, polycythemia, hypoxic pulmonary vasoconstriction-increased intracellular oxidative enzymes, and increased capillary density in muscle.
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Medical problems occur at high altitude because of the low inspired Po(2), which is caused by the reduced barometric pressure. The classical physiological responses to high altitude include hyperventilation, polycythemia, hypoxic pulmonary vasoconstriction-increased intracellular oxidative enzymes, and increased capillary density in muscle.
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Physics Today, 1950
Science has always been international, and where it has flourished it has been nurtured by the contributions of men from all nations. High altitude laboratories similarly are especially beneficial if they are organized on an international basis. High altitude laboratories can serve the scientific community in many ways.
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Science has always been international, and where it has flourished it has been nurtured by the contributions of men from all nations. High altitude laboratories similarly are especially beneficial if they are organized on an international basis. High altitude laboratories can serve the scientific community in many ways.
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Medical Clinics of North America, 2016
Individuals may seek the advice of medical providers when considering travel to high altitude. This article provides a basic framework for counseling and evaluating such patients. After defining "high altitude" and describing the key environmental features at higher elevations, the physiologic changes that occur at high altitude and how these changes ...
Nicholas J, Johnson, Andrew M, Luks
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Individuals may seek the advice of medical providers when considering travel to high altitude. This article provides a basic framework for counseling and evaluating such patients. After defining "high altitude" and describing the key environmental features at higher elevations, the physiologic changes that occur at high altitude and how these changes ...
Nicholas J, Johnson, Andrew M, Luks
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Archivos de la Sociedad Española de Oftalmología (English Edition), 2012
This case report presents a 36 year-old male with a sudden loss of vision while taking part in an expedition in the Daulaghiri (8,167 metres high peak located in the Himalayan Mountain Range).High altitude retinal haemorrhage is a common condition in those mountaineers who reach altitudes over 5,500m.
N, Pardiñas Barón +4 more
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This case report presents a 36 year-old male with a sudden loss of vision while taking part in an expedition in the Daulaghiri (8,167 metres high peak located in the Himalayan Mountain Range).High altitude retinal haemorrhage is a common condition in those mountaineers who reach altitudes over 5,500m.
N, Pardiñas Barón +4 more
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Medicine & Science in Sports & Exercise, 1999
We examined the effect of altitude up to 5200 m on marathon (42,195 m) performances.Eight elite and four good runners participated in a marathon at 4300-m altitude (A1), and five elite runners participated both in A1 and in a marathon at 5200-m altitude (A2).
G S, Roi +2 more
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We examined the effect of altitude up to 5200 m on marathon (42,195 m) performances.Eight elite and four good runners participated in a marathon at 4300-m altitude (A1), and five elite runners participated both in A1 and in a marathon at 5200-m altitude (A2).
G S, Roi +2 more
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