Hipóxia hipobárica e o sistema cardiorrespiratório
Introduction: Physical exercise performed at altitude generates adaptive physiological demands, especially in the cardiorespiratory system, caused by the decrease in atmospheric pressure, which leads acute and chronic responses in the human body. Objective: The aim of this study is to identify and...
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| Formato: | bachelorThesis |
| Idioma: | pt_BR |
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Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/50978 |
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| Resumo: | Introduction: Physical exercise performed at altitude generates adaptive physiological demands, especially in the cardiorespiratory system, caused by the decrease in atmospheric pressure, which leads acute and chronic responses in the human body.
Objective: The aim of this study is to identify and present the most important immediate
responses of the cardiorespiratory system related to respiratory drive and blood flow, caused by acute exposure to hypobaric hypoxia.
Methods: An integrative literature review was carried out based on 585 studies on the subject, surveyed in the PubMed, PMC and Google Scholar databases. The studies were screened and compared with the eligibility criteria, resulting in the selection of five studies, in which general conclusions were identified on the influence of acute exposure to hypobaric hypoxia on the physiological parameters associated with respiratory drive and blood flow.
Results: The selected studies are independent and present consistent results, carried out with healthy individuals, aged over 18 years. They presented results suggesting a decrease in VO2max, an increase in respiratory rate, a reduction in arterial oxygen saturation, an increase in heart rate, systolic volume and cardiac output.
Conclusions: Acute exposure to hypobaric hypoxia in natural conditions at altitude or in the laboratory increases heart rate, stroke volume, cardiac output and respiratory rate. Also, it reduces VO2max and partial oxygen saturation. As for blood pressure, the studies show divergent results. |
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