Radiofrequency electromagnetic field affects heart rate variability in rabbits.

Abstract

The aim of this study was to assess the effects of radiofrequency electromagnetic field (RF EMF) on heart rate variability (HRV) in rabbits with intensity slightly exceeding the limits for occupations. Totally 21 New Zealand white rabbits divided into two groups were used in this double-blind study. The first group of animals without general anesthesia was subjected to HRV examination under exposure to a device generated RF EMF source (frequency 1788 MHz, intensity 160 V/m, lasting 150 min.). The second group (premedications + alpha chloralose mg/kg) underwent the same protocol under the exposure to the real RF EMF signal from the base stations of mobile providers (frequency range 1805 - 1870 MHz - corresponding to the downlink signal of Slovak mobile providers, 160 V/m, 150 min., respectively). Individual 5 min records were used to analyze the HRV parameters: heart rate and root Mean Square of the Successive Differences (rMSSD) for time domain analysis and spectral powers in the low (LF-VFS) and high frequency (HF-VFS) bands for frequency domain analysis. Our study revealed the increased in HRV parameters (HF-HRV, rMSSD) associated with lower heart rate indicating increased cardiac vagal control under the exposure to RF EMF in experimental methods.

AI evidence extraction

Main findings

In 21 rabbits exposed for 150 minutes to RF EMF at 160 V/m (either a device-generated 1788 MHz source or real base-station downlink signals in the 1805–1870 MHz range), HRV parameters increased (reported for HF-HRV and rMSSD) and heart rate was lower, interpreted as increased cardiac vagal control under RF EMF exposure.

Outcomes measured

• heart rate variability (HRV)
• heart rate
• rMSSD
• HF-HRV (high-frequency spectral power)
• LF-VFS (low-frequency spectral power)

Limitations

• Exposure intensity described as slightly exceeding occupational limits, but no quantitative comparison to limits is provided in the abstract.
• Two exposure conditions differed in anesthesia/premedication status, which may affect HRV and complicate comparisons.
• Only selected HRV parameters and 5-minute segments are described; broader cardiovascular outcomes are not mentioned.
• No sham/control (no-exposure) condition is described in the abstract.

Suggested hubs

• occupational-exposure (0.55)
  Exposure intensity is described as slightly exceeding occupational limits.

{
    "study_type": "animal",
    "exposure": {
        "band": "RF",
        "source": "base station",
        "frequency_mhz": 1788,
        "sar_wkg": null,
        "duration": "150 min"
    },
    "population": "New Zealand white rabbits",
    "sample_size": 21,
    "outcomes": [
        "heart rate variability (HRV)",
        "heart rate",
        "rMSSD",
        "HF-HRV (high-frequency spectral power)",
        "LF-VFS (low-frequency spectral power)"
    ],
    "main_findings": "In 21 rabbits exposed for 150 minutes to RF EMF at 160 V/m (either a device-generated 1788 MHz source or real base-station downlink signals in the 1805–1870 MHz range), HRV parameters increased (reported for HF-HRV and rMSSD) and heart rate was lower, interpreted as increased cardiac vagal control under RF EMF exposure.",
    "effect_direction": "benefit",
    "limitations": [
        "Exposure intensity described as slightly exceeding occupational limits, but no quantitative comparison to limits is provided in the abstract.",
        "Two exposure conditions differed in anesthesia/premedication status, which may affect HRV and complicate comparisons.",
        "Only selected HRV parameters and 5-minute segments are described; broader cardiovascular outcomes are not mentioned.",
        "No sham/control (no-exposure) condition is described in the abstract."
    ],
    "evidence_strength": "low",
    "confidence": 0.7399999999999999911182158029987476766109466552734375,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "radiofrequency electromagnetic field",
        "RF EMF",
        "heart rate variability",
        "HRV",
        "rMSSD",
        "HF-HRV",
        "vagal control",
        "rabbits",
        "base station",
        "1788 MHz",
        "1805-1870 MHz",
        "160 V/m"
    ],
    "suggested_hubs": [
        {
            "slug": "occupational-exposure",
            "weight": 0.5500000000000000444089209850062616169452667236328125,
            "reason": "Exposure intensity is described as slightly exceeding occupational limits."
        }
    ]
}

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