Study type: Medical/biological study (experimental study)

Absence of heart-rate effects in isolated frog heart irradiated with pulse modulated microwave energy med./bio.

By: Clapman RM, Cain CA
Published in: J Microw Power 1975; 10 (4): 411-419
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Aim of study (acc. to author)

To study the effects of pulse modulated microwave exposure on heart rate in isolated frog hearts.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 3 GHz
Modulation type: pulsed
Exposure duration: intermittent 1 min off/on
Exposure 2: 1.42 GHz
Modulation type: pulsed
Exposure duration: intermittent 1 min off/on

General information

Pulse modulated microwave was applied synchronized with ECG. Group 15 was used as control and no MMW irradiation applied.

Exposure 1

Main characteristics
Frequency 3 GHz
Exposure duration intermittent 1 min off/on
Modulation
Modulation type pulsed
Additional info

pulse width 2 µs or 10 µs
Exposure setup
Exposure source
Chamber Eccosorb lined chamber/5 cubic ft.
Additional info The hearts were placed in petri plates and kept dorsal side up on the lucite mount with longitudinal axis parallel to the E vector.
Parameters
Measurand Value Type Method Mass Remarks
power density 5.5 W/cm² peak value calculated - calculated from measured average power density.

Exposure 2

Main characteristics
Frequency 1.42 GHz
Exposure duration intermittent 1 min off/on
Modulation
Modulation type pulsed
Additional info

pulse width 10 µs or 150 µs
Exposure setup
Exposure source
Chamber Eccosorb lined chamber/5 cubic ft.
Parameters
Measurand Value Type Method Mass Remarks
power density 600 W/m² peak value calculated - calculated from measured average power density.

Exposed system:

Methods Endpoint/measurement parameters/methodology

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

Main outcome of study (acc. to author)

Pulse modulation of microwave exposure was coupled to the P waves of the ECG. No significant changes in heart rates were observed at any of the used modulations.

Study character:

Study funded by