Study type: Medical/biological study (experimental study)

The effect of GSM and TETRA mobile handset signals on blood pressure, catechol levels and heart rate variability. med./bio.

Published in: Bioelectromagnetics 2007; 28 (6): 433-438

Aim of study (acc. to author)

1) To study whether the radiofrequency signals from GSM and TETRA handsets cause acute changes in the blood pressure of normal volunteers (n=120).
2) To study heart rate variability and blood catechol concentrations as markers of sympathetic nervous system activity, and to measure blood pressure for 24 h after exposure to determine the duration of any blood pressure changes observed.

Endpoint

Exposure

Exposure Parameters
Exposure 1:
Modulation type: pulsed, CW
Exposure duration: continuous for 40 min
  • SAR: 1.3 W/kg peak value (10 g) (70 % of the ICNIRP general public exposure limits of 2 W/kg averaged over 10 g to head and trunk)

Exposure 1

Main characteristics
Frequency
Type
Exposure duration continuous for 40 min
Modulation
Modulation type pulsed, CW
Additional info

GSM and TETRA: for both simulated a) modulated mode b) carrier wave mode c) sham mode

Exposure setup
Exposure source
Setup handset fitted in a standard position against the left side of the head
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
SAR 1.3 W/kg peak value calibration 10 g 70 % of the ICNIRP general public exposure limits of 2 W/kg averaged over 10 g to head and trunk

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Investigated organ system:
Time of investigation:
  • before exposure
  • during exposure
  • after exposure

Main outcome of study (acc. to author)

The data showed no effect of GSM and TETRA signals on blood pressure and related cardiovascular parameters.

Study character:

Study funded by

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