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Assessment of heart rate variability under exposure to GSM 900-MHz signal from mobile phone in healthy young people

Abstract : Purpose: Recently a National Toxicology Program has issued their technical reports (NTP TR 595 [1] and NTP TR 596 [2]). They found that high exposure to radio frequency radiation (RFR) used by cell phones was associated with clear evidence of tumors in the hearts of male rats. In this context and given the large number of mobile phone users worldwide, the present study was focused on the effect of RFR of mobile phone on the heart rate variability (HRV). The aim of the present study was to analyze, in healthy subjects at rest, the influence of exposure to GSM 900MHz on HRV parameters. Participants and Methods: Twenty-six young healthy volunteers participated in the experiment. The volunteers were selected following a routine clinical examination. Inclusion criteria included regular sleep habits, no medication, no chronic disease or disability, no recent acute illness, no smoking, and no neurological or psychiatric illness. Participants having a history of cardiovascular disease were excluded. Volunteers participated into two ECG recording sessions. For each session, the participants were exposed for 26 min to sham or real GSM RF exposure. Exposure to RF EMF was performed by a commercial dual-band GSM mobile phone (Nokia 6650). The HRV was evaluated by both time domain and frequency domain analysis. Standard deviation of all R–R intervals (SDNN) and root-mean-square of successive differences (RMSSD) were measured in the time domain analysis of HRV. For frequency domain parameters, spectral analysis was performed by using fast-Fourier transform method. We analyzed the very low-frequency component (VLF), the low-frequency component (LF), and the high-frequency component (HF). The LF and HF powers were also converted into normalized units (LFnu, HFnu). Sympathovagal balance was expressed as the LF/HF ratio. Results: Analysis of time domain HRV parameters showed that SDNN was significantly higher during the exposure session when compared to the control session. Analysis of frequency domain HRV parameters demonstrated that absolute values of LF power and total power were significantly increased during exposure (p = 0.0463 and p = 0.0427 respectively). However, VLF, HF, LF n.u, HF n.u and LF/HF ration were not affected. In conclusion, it seems that most HRV parameters were not affected by GSM signal in our study. The weak effect observed on frequency domain HRV LF or total power is likely to represent a random occurrence rather than a real effect.
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Submitted on : Wednesday, May 19, 2021 - 9:24:31 AM
Last modification on : Saturday, June 5, 2021 - 2:02:01 PM

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  • HAL Id : ineris-03229563, version 1

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Brahim Selmaoui, Soafara Andrianome, Erwan Stéphan‐blanchard, Frédéric Telliez. Assessment of heart rate variability under exposure to GSM 900-MHz signal from mobile phone in healthy young people. 55. Congress of the European Societies of Toxicology (EUROTOX 2019), Sep 2019, Helsinki, Finland. pp.S114-S115. ⟨ineris-03229563⟩

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