Cellular Phone Irradiation of the Head Affects Heart Rate Variability Depending on Inspiration/Expiration Ratio

2018 · Mixed · Low evidence

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MixedLow evidencePaper 1940

Compared with sham exposure, no significant exposure-related changes were found in HRA by Porta and Guzik indices. Time-domain HRV parameters showed significant differences during exposure at 1:1 paced breathing but not at 1:2 paced breathing; a mild post-exp…

Study snapshot

Publicationmanual · 2018

Study typerandomized_trial

Reported directionMixed

Evidence ratingLow

Abstract

Cellular Phone Irradiation of the Head Affects Heart Rate Variability Depending on Inspiration/Expiration Ratio Béres S, Németh Á, Ajtay Z, Kiss I, Németh B, Hejjel L. Cellular Phone Irradiation of the Head Affects Heart Rate Variability Depending on Inspiration/Expiration Ratio. In Vivo. 2018 Sep-Oct;32(5):1145-1153. doi: 10.21873/invivo.11357. Abstract 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. Open access paper: ncbi.nlm.nih.gov

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AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typerandomized_trial

Effect directionmixed

Population20 healthy volunteers

Sample size20

ExposureRF · 1800 MHz · short-term

Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

Outcomes measured

heart rate asymmetry (HRA)
heart rate variability (HRV)
Porta index
Guzik index
time-domain HRV parameters
root mean square of successive RR-differences (RMSSD)

View raw extracted JSON

{
  "study_type": "randomized_trial",
  "exposure": {
    "band": "RF",
    "source": "mobile phone",
    "frequency_mhz": 1800,
    "sar_wkg": null,
    "duration": "short-term"
  },
  "population": "20 healthy volunteers",
  "sample_size": 20,
  "outcomes": [
    "heart rate asymmetry (HRA)",
    "heart rate variability (HRV)",
    "Porta index",
    "Guzik index",
    "time-domain HRV parameters",
    "root mean square of successive RR-differences (RMSSD)"
  ],
  "main_findings": "Compared with sham exposure, no significant exposure-related changes were found in HRA by Porta and Guzik indices. Time-domain HRV parameters showed significant differences during exposure at 1:1 paced breathing but not at 1:2 paced breathing; a mild post-exposure effect was observed for RMSSD.",
  "effect_direction": "mixed",
  "limitations": [],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "GSM",
    "1800 MHz",
    "cellular phone",
    "handset emission",
    "sham exposure",
    "heart rate variability",
    "heart rate asymmetry",
    "autonomic nervous system",
    "paced breathing",
    "inspiration/expiration ratio"
  ],
  "suggested_hubs": [
    {
      "slug": "mobile-phones-rf",
      "weight": 0.9,
      "reason": "Short-term 1,800 MHz GSM cellular phone (handset) exposure compared with sham."
    }
  ]
}

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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.21873/invivo.11357
PubMed: Not supplied

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