Study type: Medical/biological study (experimental study)

Respiratory sinus arrhythmia among menopausal women after exposition to extremely-low-frequency magnetic fields med./bio.

By: Pecyna MB
Published in: J Physiol Pharmacol 2005; 56: 179-184
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Aim of study (acc. to author)

This in vivo study was conducted to show that respiratory sinus arrhythmia corresponds with the perception of psychosomatic complaints and can be modulated by the exposure to extremely low frequency magnetic fields.

Background/further details

Two groups of menopausal women (aged between 45-55 years), each consisting of 85 subjects, were compared, one of which exhibiting typical menopausal symptoms like difficulties with falling asleep, frequent awakening at night, sweating and weakness during the day and the other being asymptomatic.
The relevant physiological parameters were recorded before and 5, 30, and 60 minutes after the exposure.

Endpoint

Exposure

Exposure Parameters
Exposure 1:
  • unspecified
Exposure duration: 12 min

Exposure 1

Main characteristics
Frequency
  • unspecified
Exposure duration 12 min
Exposure setup
Exposure source
  • magnetic stimulator + cushion set in the area of head, shoulders and chest
Parameters
Measurand Value Type Method Mass Remarks
magnetic flux density 45 µT - - - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

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

Main outcome of study (acc. to author)

The respiratory sinus arrhythmia, heart and breathing rates were substantially greater in women with psychosomatic complaints than in asymptomatic women. In both groups, the respiratory sinus arrhythmia was marginally enhanced following exposure to extremely low frequency magnetic fields.

Study character:

Study funded by

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