HIGHLIGHTED TOPIC Hypoxia Acute mountain sickness, chemosensitivity, and cardiorespiratory responses in humans exposed to hypobaric and normobaric hypoxia
نویسندگان
چکیده
Normand A. Richard, Inderjeet S. Sahota, Nadia Widmer, Sherri Ferguson, A. William Sheel, and Michael S. Koehle School of Kinesiology, University of British Columbia, Vancouver, British Columbia, Canada; Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada; Environmental Medicine and Physiology Unit, Faculty of Science, Simon Fraser University, Burnaby, British Columbia, Canada; Department of Biomedical Physiology and Kinesiology, Simon Fraser University, Burnaby, British Columbia, Canada; and Division of Sport Medicine, Department of Family Practice, Vancouver, British Columbia, Canada
منابع مشابه
Acute mountain sickness, chemosensitivity, and cardiorespiratory responses in humans exposed to hypobaric and normobaric hypoxia.
We examined the control of breathing, cardiorespiratory effects, and the incidence of acute mountain sickness (AMS) in humans exposed to hypobaric hypoxia (HH) and normobaric hypoxia (NH), and under two control conditions [hypobaric normoxia (HN) and normobaric normoxia (NN)]. Exposures were 6 h in duration, and separated by 2 wk between hypoxic exposures and 1 wk between normoxic exposures. Be...
متن کاملPrediction of susceptibility to acute mountain sickness by SaO2 values during short-term exposure to hypoxia.
Prediction of the development of acute mountain sickness (AMS) in individuals going to high altitudes is still a matter of debate. Whereas some studies found that subjects with a blunted hypoxic ventilatory response (HVR) are predisposed to AMS, others did not. However, the HVR has often been determined under very acute (5 to 10 min) isocapnic hypoxia without consideration of the subsequent hyp...
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Introduction: Chronic mountain sickness (CMS) represents a syndrome of secondary polycythemia along with thrombocytopenia, altered hemorheology, pulmonary and systemic hypertension, and congestive heart failure, occurring due to hypobaric hypoxia-anoxia-induced erythropoiesis reported in both native mountain residents and new climbers after prolonged stays at high and extreme a...
متن کاملDiscerning normobaric and hypobaric hypoxia: significance of exposure duration.
TO THE EDITOR: We read a recently published article (4) with great interest. The authors performed a rigorously controlled study scrutinizing the possible differences in cardiorespiratory responses, control of breathing, and acute mountain sickness (AMS) incidence during short-term (6 h) exposures to hypobaric (HH) and normobaric hypoxia (NH). We commend the authors for their smart experimental...
متن کاملAcute Mountain Sickness Symptoms Depend on Normobaric versus Hypobaric Hypoxia
Acute mountain sickness (AMS), characterized by headache, nausea, fatigue, and dizziness when unacclimatized individuals rapidly ascend to high altitude, is exacerbated by exercise and can be disabling. Although AMS is observed in both normobaric (NH) and hypobaric hypoxia (HH), recent evidence suggests that NH and HH produce different physiological responses. We evaluated whether AMS symptoms ...
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