ID Number		2795
Study Type		Human / Provocation
Model		This study investigated heart rate asymmetry (HRA) and heart rate variability (HRV) parameters with 1:2 and 1:1 metronome paced inspiration/expiration ratios during short-term 1,800 MHz GSM cellular phone exposure in 20 healthy volunteers.
Details		AUTHORS' ABSTRACT: Béres et al. 2018 (IEEE #7091):BACKGROUND: Mobile phones may have harmful health effects and clinical examinations report ambiguous results of exposure concerning neurophysiological and cardiovascular actions. MATERIALS AND METHODS: This study investigated heart rate asymmetry (HRA) and heart rate variability (HRV) parameters with 1:2 and 1:1 metronome-paced inspiration/expiration ratios during short-term 1,800MHz GSM cellular phone exposure in 20 healthy volunteers. RESULTS: Significant HRA changes by Porta and Guzik indices were not found on exposure compared to sham exposure. Time-domain HRV parameters on exposure showed significant differences at 1:1 paced, but not at 1:2 paced breathing compared to sham exposure. A mild post-exposure effect was observed regarding root mean square of successive RR-differences. CONCLUSION: The findings reflect persisting acute effects of GSM handset emission on the autonomic nervous system. Exploring its influences on health status and survival needs further studies. Symmetrical breathing can be used as a sensitizing factor in other HRV/HRA analysis studies.
Findings		Effects
Status		Completed With Publication
Principal Investigator		University of Pécs, Pécs, Hungary
Funding Agency		?????
Country		HUNGARY
References		Béres, S et al. in vivo., (2018) 32:1145-1153
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