Study type: Medical/biological study (experimental study)

Resting blood pressure increase during exposure to a radio-frequency electromagnetic field med./bio.

Published in: Lancet 1998; 351 (9119): 1857-1858

Aim of study (acc. to author)

To study the influence of the electromagnetic field of a mobile phone on blood pressure, heart rate, capillary perfusion, and subjective well-being.

Background/further details

Each of ten subjects underwent the same protocol five times on different days.



Exposure Parameters
Exposure 1: 900 MHz
Modulation type: pulsed
Exposure duration: continuous for 35 min

Exposure 1

Main characteristics
Frequency 900 MHz
Exposure duration continuous for 35 min
Modulation type pulsed
Repetition frequency 217 Hz
Exposure setup
Exposure source
Setup The mobile phone was fixed in a typical position on the right side of the head and operated by remote control so that the subjects did not know its status.
Sham exposure A sham exposure was conducted.
Additional info The protocol was a fixed sequence of sham and EMF exposures. The subjects, however, expected a random sequence.
Measurand Value Type Method Mass Remarks
power 2 W unspecified unspecified - -

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 that exposure to a radiofrequency mobile phone field causes an increase in sympathetic efferent activity with increases in resting blood pressure between 5 and 10 mm Hg, most likely due to more pronounced vasoconstriction (as measured by capillary perfusion).
No statistically significant effects of the electromagnetic field on subjective parameters were found.

Study character:

Study funded by

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