The cardiovascular response to an acute 1800-μT, 60-Hz magnetic field exposure in humans

Abstract

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.

The response of the human circulatory system to an acute 200-μT, 60-Hz magnetic field exposure

“…The absence of HR effects lends support to the body of evidence, suggesting ELF MF do not affect the HR. These findings are consistent with the results observed in our previous work using an 1,800-lT MF exposure chamber (McNamee et al 2010) as well as others Sait et al 2006;Ghione et al 2005;Kurokawa et al 2003). It should be pointed out that in the current paper, the HR is recorded during a 1-h period of MF exposure at both 15 and 30 min after the field has been turned on.…”

“…Previous preliminary work in our laboratory has suggested an effect of a pulsed 60-Hz, 200-lT (peak) ELF MF exposure session on microcirculation in rats (Hensel et al 2003). Additionally, beyond the positive results from Hensel et al (2003), our 1,800-lT study indicated that skin surface temperature might have been modulated by MF exposure conditions (McNamee et al 2010). In the absence of an alternative explanation, it was not possible to rule out an MF exposure effect on skin surface temperature.…”

“…Xu et al (2000), however, exposed 74 anesthetized mice to a whole body, 50-Hz (100 lT) MF for 10 min and found increases in peak blood velocities after exposure. In a recent study (McNamee et al 2010), our group investigated microcirculation (as skin blood perfusion) in 41 subjects who were exposed for 1 h to a whole body, 60-Hz, 1,800-lT MF and found a perfusion decrease throughout exposure that was attributed to a reduction in arousal levels induced by the experimental procedure. However, no MF effect on the skin blood perfusion was observed in this study.…”

“…No significant effects of MF exposure were observed in 6 different indices of HR and HRV for any of the MF combinations. Our group also examined HR and HRV in 43 human subjects whole-body exposed to a 60-Hz, 1,800-lT MF for 1 h and found no effects of MF exposure (McNamee et al 2010).…”

Assessment of the efficacy of laser biostimulation and low-frequency pulsed magnetic field in the treatment of microvascular abnormalities in patients with Raynaud’s phenomenon

“…Mimo licznych badań dotyczących oddziaływania pola magnetycznego oraz biostymulacji laserowej na organizm, wiele efektów biologicznych, będących wynikiem ich działania, nadal pozostaje niewyjaśnionych [26]. Dlatego w praktyce terapię objawu Raynauda rozpoczyna się najczęściej od leczenia farmakologicznego, pozostawiając postępowanie fizjoterapeutyczne jako uzupełnienie bądź alternatywę, zwłaszcza w przypadku wystąpienia działań niepożądanych.…”