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This article outlines the fundamental physiology and pathology of high altitude. It covers the latest findings from the unique experiment Operation Everest II in which eight persons were gradually decompressed to the "summit" of Mt. Everest and extensive physiologic studies done. The article
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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
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A report is given on three patients who noticed an acute deterioration of visual acuity after a sojourn at 5000 altitude caused by retinal hemorrhages. We documented both the ophthalmological examinations such as visual acuity, fundus, perimetry and fluorescence-angiography and the systemic results.
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Retinal hemorrhages appear to be a frequent, though often unappreciated, occurrence in unacclimated climbers experiencing prolonged exposure to altitudes above approximately 3,658 meters (12,000 ft), heights frequently attained by American moutaineers. This condition has not received attention in
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Infection with rickettsiae of the spotted fever group was clinically and serologically diagnosed in four dogs from two households on Long Island. In two dogs, clinical signs included high fever (to 40.5 C), abdominal pain, lethargy, depression, anorexia, and nystagmus. One of these dogs had
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Immobilization and splinting of fractures are essential to reduce morbidity and mortality in mountain rescue. Therefore, members of the International Commission for Mountain Emergency Medicine (ICAR MEDCOM) debated the results of a literature review carried out by the authors. Focusing on common
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The authors discuss modern views on altitude acclimatization and acute mountain sickness (A.M.S.). They particularly consider recent observations of high altitude retinal hemorrhages (H.A.R.H.). They report some subjects they personally examined and suggest the probable factors involved in the
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Rocky Mountain spotted fever can present with predominantly abdominal symptoms including nausea, vomiting, diarrhea, and abdominal pain. Two elderly patients presented with an acute febrile illness and abdominal symptoms. Rash was not present initially. Workup disclosed cholelithiasis in one, and a
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During the 1975 British Everest Expedition, which made the first ascent of the south-west face, observations were made in relation to mountain sickness and the appearance of retinal changes. Two Sherpas with cerebral oedema and one Briton with pulmonary oedema were treated. Retinal haemorrhages
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The symptoms and signs of acute mountain sickness are present in about half of the tourists trekking in Nepal to an altitude of 42000 m. The most common symptoms are headache and nausea. Pulmonary rales are found in more than 10% of trekkers, while high altitude pulmonary edema is rare. Retinal
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Severely injured patients with hemorrhage present major challenges for emergency medical services, especially during mountain rescue missions in which harsh environmental conditions and long out-of-hospital times are frequent. Because uncontrolled hemorrhage is the leading cause of death within the
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BACKGROUND
Primary pneumonic plague is a rare but often fatal form of Yersinia pestis infection that results from direct inhalation of bacteria and is potentially transmissible from person to person. We describe a case of primary pneumonic plague in a wildlife biologist who was found deceased in his
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Dogs were examined ophthalmoscopically to determine the prevalence and type of ocular lesions associated with naturally acquired Rocky Mountain spotted fever (RMSF). In a consecutive series of 11 dogs with serologically confirmed RMSF, 9 had ocular involvement reflecting various degrees of vascular
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