Results 261 to 270 of about 182,191 (313)
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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 Lukš
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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 Lukš
exaly +3 more sources
Lancet, The, 2003
High-altitude illness is the collective term for acute mountain sickness (AMS), high-altitude cerebral oedema (HACE), and high-altitude pulmonary oedema (HAPE). The pathophysiology of these syndromes is not completely understood, although studies have substantially contributed to the current understanding of several areas.
Buddha Basnyat, David R Murdoch
exaly +3 more sources
High-altitude illness is the collective term for acute mountain sickness (AMS), high-altitude cerebral oedema (HACE), and high-altitude pulmonary oedema (HAPE). The pathophysiology of these syndromes is not completely understood, although studies have substantially contributed to the current understanding of several areas.
Buddha Basnyat, David R Murdoch
exaly +3 more sources
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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Expert Review of Neurotherapeutics, 2007
A human being's exposure to altitude, and the consequent hypobarism, entails a complex series of adaptive mechanisms that depend on the rate of ascent and the altitude reached. When these mechanisms fail, so-called acute mountain sickness (AMS) results, with headache as its predominant symptom.
Luiz P, Queiroz, Alan M, Rapoport
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A human being's exposure to altitude, and the consequent hypobarism, entails a complex series of adaptive mechanisms that depend on the rate of ascent and the altitude reached. When these mechanisms fail, so-called acute mountain sickness (AMS) results, with headache as its predominant symptom.
Luiz P, Queiroz, Alan M, Rapoport
openaire +4 more sources
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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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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Emergency Medicine Clinics of North America, 1997
This article discusses prevention, recognition, and treatment of altitude illnesses, especially acute mountain sickness, high-altitude pulmonary edema, and high-altitude cerebral edema. Physicians advising travelers and trekkers who will be visiting high-altitude areas will find an organized approach to giving pretravel advice. Physicians practicing in
K, Zafren, B, Honigman
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This article discusses prevention, recognition, and treatment of altitude illnesses, especially acute mountain sickness, high-altitude pulmonary edema, and high-altitude cerebral edema. Physicians advising travelers and trekkers who will be visiting high-altitude areas will find an organized approach to giving pretravel advice. Physicians practicing in
K, Zafren, B, Honigman
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The Lancet Respiratory Medicine, 2012
Abstract Medical problems occur at high altitude because of the low inspired Po2, 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 ...
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Abstract Medical problems occur at high altitude because of the low inspired Po2, 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 ...
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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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American Journal of Ophthalmology, 1997
To report a patient with high-altitude retinopathy.A 30-year-old man with high-altitude retinopathy was examined and treated.After spending 2 weeks at an altitude of 7,000 meters and then descending to sea level, the patient's visual acuity was RE, 20/20 and LE, 20/50.
G E, Lang, G B, Kuba
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To report a patient with high-altitude retinopathy.A 30-year-old man with high-altitude retinopathy was examined and treated.After spending 2 weeks at an altitude of 7,000 meters and then descending to sea level, the patient's visual acuity was RE, 20/20 and LE, 20/50.
G E, Lang, G B, Kuba
openaire +2 more sources