| Pulmonary gas exchange is reduced by the cardiovascular diving response in resting humans. | |
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MedLine Citation:
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PMID: 18088568 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The diving response reduces the pulmonary O(2) uptake in exercising humans, but it has been debated whether this effect is present at rest. Therefore, respiratory and cardiovascular responses were recorded in 16 resting subjects, performing apnea in air and apnea with face immersion in cold water (10 degrees C). Duration of apneas were predetermined to be identical in both conditions (average: 145 s) and based on individual maximal capacity (average: 184 s). Compared to apnea in air, an augmented diving response was elicited by apnea with face immersion. The O(2) uptake from the lungs was reduced compared to the resting eupneic control (4.6 ml min(-1)kg(-1)), during apnea in air (3.6 ml min(-1)kg(-1)) and even more so during apnea with face immersion (3.4 ml min(-1)kg(-1)). We conclude that the cardiovascular adjustments of the diving response reduces pulmonary gas exchange in resting humans, allowing longer apneas by preserving the lungs' O(2) store for use by vital organs. |
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Authors:
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Johan P A Andersson; Gustaf Biasoletto-Tjellström; Erika K A Schagatay |
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Publication Detail:
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Type: Controlled Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't Date: 2007-11-07 |
Journal Detail:
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Title: Respiratory physiology & neurobiology Volume: 160 ISSN: 1569-9048 ISO Abbreviation: Respir Physiol Neurobiol Publication Date: 2008 Feb |
Date Detail:
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Created Date: 2008-02-25 Completed Date: 2008-06-13 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101140022 Medline TA: Respir Physiol Neurobiol Country: Netherlands |
Other Details:
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Languages: eng Pagination: 320-4 Citation Subset: IM |
Affiliation:
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Department of Cell and Organism Biology, Lund University, Lund, Sweden. Johan.Andersson@cob.lu.se |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Blood Pressure / physiology Breath Tests / methods Cardiovascular System* Diving / physiology* Electrocardiography / methods Heart Rate / physiology Humans Immersion Lactic Acid / blood Male Pulmonary Gas Exchange / physiology* Rest / physiology* |
| Chemical | |
Reg. No./Substance:
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50-21-5/Lactic Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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