| The response of the human circulatory system to an acute 200-μT, 60-Hz magnetic field exposure. | |
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MedLine Citation:
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PMID: 20496180 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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PURPOSE: Recent research by the authors on the effects of extremely low-frequency (ELF) magnetic field (MF) exposure on human heart rate (HR), heart rate variability (HRV), and skin blood perfusion found no cardiovascular effects of exposure to an 1,800-μT, 60-Hz MF. Research from our group using rats, however, has suggested a microcirculatory response to a 200-μT, 60-Hz MF exposure. The present pilot study investigated the effects of 1 h of exposure to a 200-μT, 60-Hz MF on the human circulation. Microcirculation (as skin blood perfusion) and HR were measured using laser Doppler flowmetry. Mean arterial pressure was monitored with a non-invasive blood pressure system. METHODS: Ten volunteers were recruited to partake in a counterbalanced, single-blinded study consisting of two testing sessions (real and sham exposure) administered on separate days. Each session included four consecutive measurement periods separated by rest, allowing assessment of cumulative and residual MF effects. RESULTS: A within-subjects analysis of variance did not reveal session by time period interactions for any of the parameters which would have been suggestive of a MF effect (p > 0.05). Perfusion, HR, and skin surface temperature decreased over the course of the experiment (p < 0.05). CONCLUSIONS: The MF used in this experiment did not affect perfusion, HR, or mean arterial pressure. Decreasing perfusion and HR trends over time were similar to our previous results and appear to be associated with a combination of inactivity (resulting in decreasing body temperatures) and reduced physiological arousal. |
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Authors:
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David A McNamee; Michael Corbacio; Julie K Weller; Samantha Brown; Robert Z Stodilka; Frank S Prato; Yves Bureau; Alex W Thomas; Alexandre G Legros |
Publication Detail:
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Type: Journal Article Date: 2010-05-25 |
Journal Detail:
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Title: International archives of occupational and environmental health Volume: 84 ISSN: 1432-1246 ISO Abbreviation: Int Arch Occup Environ Health Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-02-11 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7512134 Medline TA: Int Arch Occup Environ Health Country: Germany |
Other Details:
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Languages: eng Pagination: 267-77 Citation Subset: IM |
Affiliation:
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Bioelectromagnetics, Imaging Program, Lawson Health Research Institute, 268 Grosvenor Street, London, Ontario, N6A 4V2, Canada. |
Export Citation:
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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