Study type: Medical/biological study (experimental study)

Cardiovascular, hematologic, and biochemical effects of acute ventral exposure of conscious rats to 2450-MHz (CW) microwave radiation. med./bio.

Published in: Bioelectromagnetics 1986; 7 (2): 223-233

Aim of study (acc. to author)

To examine the influence of acute (6 h) exposure to 2450 MHz (continuous wave) microwave irradiation on certain cardiovascular, biochemical, and hematologic indices in rats.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 2.45 GHz
Modulation type: CW
Exposure duration: 6 h

Exposure 1

Main characteristics
Frequency 2.45 GHz
Type
Exposure duration 6 h
Modulation
Modulation type CW
Exposure setup
Exposure source
Distance between exposed object and exposure source 0.45 m
Chamber small metal chamber 61cm x 61cm x 122 cm lined with microwave absorber (-35dB at 2,45GHz)
Setup 17 cm x 5 cm x 6 cm cage constructed of 1/2 x 3/8 inch grid acrylic with a styrofoam holder placed inside the chamer
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
SAR 3.7 mW/g average over mass - whole body -
power density 10 mW/cm² - - - -

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)

In the sham-exposed and exposed animals, the preexposure mean arterial blood pressure, heart rate, and colonic temperature were approximately 120 +/- 5 mmHg, 450 +/- 10 beats/min, and 37.0 +/- 0.2°C, respectively. In the sham-exposed animals these values remained stable throughout the 6 h exposure period. In the exposed rats, no effects were observed on mean arterial blood pressure or colonic temperature; however after 1 h of irradiation, a significant decrease in heart rate was noted (450 versus 400 beats/min). This reduction in heart rate persisted throughout the remainder of the exposure period. None of the hematologic or biochemical parameters investigated were affected by the microwave irradiation. Although other mechanisms may be responsible, this reduction in heart rate may have been due to cardiovascular adjustments because of microwave-induced heating with a resultant decrease in resting metabolic rate.

Study character:

Study funded by

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