| A pilot investigation of the effect of extremely low frequency pulsed electromagnetic fields on humans' heart rate variability. | |
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MedLine Citation:
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PMID: 16988996 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The question whether pulsed electromagnetic field (PEMF) can affect the heart rhythm is still controversial. This study investigates the effects on the cardiocirculatory system of ELF-PEMFs. It is a follow-up to an investigation made of the possible therapeutic effect ELF-PEMFs, using a commercially available magneto therapeutic unit, had on soft tissue injury repair in humans. Modulation of heart rate (HR) or heart rate variability (HRV) can be detected from changes in periodicity of the R-R interval and/or from changes in the numbers of heart-beat/min (bpm), however, R-R interval analysis gives only a quantitative insight into HRV. A qualitative understanding of HRV can be obtained considering the power spectral density (PSD) of the R-R intervals Fourier transform. In this study PSD is the investigative tool used, more specifically the low frequency (LF) PSD and high frequency (HF) PSD ratio (LF/HF) which is an indicator of sympatho-vagal balance. To obtain the PSD value, variations of the R-R time intervals were evaluated from a continuously recorded ECG. The results show a HR variation in all the subjects when they are exposed to the same ELF-PEMF. This variation can be detected by observing the change in the sympatho-vagal equilibrium, which is an indicator of modulation of heart activity. Variation of the LF/HF PSD ratio mainly occurs at transition times from exposure to nonexposure, or vice versa. Also of interest are the results obtained during the exposure of one subject to a range of different ELF-PEMFs. This pilot study suggests that a full investigation into the effect of ELF-PEMFs on the cardiovascular system is justified. |
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Authors:
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Emilio Baldi; Claudio Baldi; Brian J Lithgow |
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Publication Detail:
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Type: Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Bioelectromagnetics Volume: 28 ISSN: 0197-8462 ISO Abbreviation: Bioelectromagnetics Publication Date: 2007 Jan |
Date Detail:
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Created Date: 2006-12-20 Completed Date: 2007-01-30 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8008281 Medline TA: Bioelectromagnetics Country: United States |
Other Details:
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Languages: eng Pagination: 64-8 Citation Subset: IM |
Affiliation:
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Diagnostic and Neurosignal Processing Research Group, Electrical & Computer System Engineering, Monash University, Victoria, Australia. Emilio.Baldi@eng.monash.edu.au |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Dose-Response Relationship, Radiation Electromagnetic Fields* Heart Rate / physiology*, radiation effects* Humans Male Middle Aged Pilot Projects Radiation Dosage |
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