| The cardiovascular response to an acute 1800-microT, 60-Hz magnetic field exposure in humans. | |
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MedLine Citation:
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PMID: 19902234 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: Previously published literature has suggested an effect of extremely low-frequency (ELF) magnetic fields (MF) on human heart rate (HR) and heart rate variability (HRV). The combined response of the microcirculation and macrocirculation to ELF MF exposure has not previously been studied in humans. This study investigated the effects of 1-h exposure to an 1800-muT, 60-Hz MF on human microcirculation (represented in this study as skin blood perfusion), HR, low-frequency HRV, and high-frequency HRV. METHODS: Fifty-eight volunteers were recruited to partake in a double-blinded, counterbalanced study consisting of two testing sessions (real and sham) administered on separate days. Each session included four consecutive blocks of measurements, separated by 15-min rest periods, allowing measurement of cumulative and residual MF effects. Within subjects, ANOVA were conducted on each of the measured parameters. RESULTS: A decrease of skin blood perfusion and HR, and an increase of HRV were observed over blocks (p < 0.05). No session by block interactions were found for any of the cardiovascular parameters which would have suggested a MF effect (p > 0.05). A session by block interaction (p < 0.001) and a MF order effect (sham or real exposure first, p < 0.05) were observed for skin surface temperature. CONCLUSIONS: The MF used in this experiment did not affect cardiovascular parameters. Although an alternative explanation for why skin surface temperatures decreased in the sham and not in the real exposure condition is presented, the possibility of a MF effect cannot be excluded. |
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Authors:
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David A McNamee; Michael Corbacio; Julie K Weller; Samantha Brown; Frank S Prato; Alex W Thomas; Alexandre G Legros |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2009-11-10 |
Journal Detail:
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Title: International archives of occupational and environmental health Volume: 83 ISSN: 1432-1246 ISO Abbreviation: Int Arch Occup Environ Health Publication Date: 2010 Apr |
Date Detail:
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Created Date: 2010-03-11 Completed Date: 2010-07-13 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: 441-54 Citation Subset: IM |
Affiliation:
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Bioelectromagnetics, Imaging Program, Lawson Health Research Institute, 268 Grosvenor Street, N6A 4V2, London, ON, Canada. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Double-Blind Method Electromagnetic Fields / adverse effects* Female Heart Rate / radiation effects* Humans Male Microcirculation / radiation effects* Middle Aged Young Adult |
| Grant Support | |
ID/Acronym/Agency:
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FRN 85217//Canadian Institutes of Health Research; MOP 43874//Canadian Institutes of Health Research |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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