Study type: Medical/biological study (experimental study)

Geomagnetic Disturbance Worsen Microcirculation Impairing Arterial Baroreflex Vascular Regulatory Mechanism med./bio.

By: Gmitrov J
Published in: Electromagn Biol Med 2005; 24 (1): 31-37
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Aim of study (acc. to author)

To study the relationship between geomagnetic field disturbance, systemic arterial blood pressure, microcirculation, and baroreflex sensitivity.

Background/further details

In a previous study (publication 9000), the authors found that geomagnetic field disturbance worsened a number of cardiovascular risk factors including arterial baroreflex sensitivity.

Endpoint

Exposure

Exposure Parameters
Exposure 1:
Exposure duration: continuous for 50 min

Exposure 1

Main characteristics
Frequency
Exposure duration continuous for 50 min
Exposure setup
Exposure source
Setup rabbits were sedated by infusing pentobarbital (5 mg/kg/h) and placed prone in a specially constructed nonmagnetic metal drum with their heads fixed.
Additional info The room where the exposure took place was maintained at 23°C.
Parameters
Measurand Value Type Method Mass Remarks
magnetic flux density 47 µT maximum - - ambient DC geomagnetic field in the lab

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 geomagnetic field disturbances worsened microcirculation and arterial baroreflex sensitivity. The decrease in baroreflex sensitivity was significantly larger compared with microcirculation suggesting that changes in the geomagnetic field at first attenuates arterial baroreflex vascular control mechanism leading to a reduction in microcirculation. No significant correlation was found between geomagnetic disturbance and arterial blood pressure.
The authors recommended on days with intense geomagnetic activities to intensify the therapy of ischaemic cerebral and heart disease in order to meliorate microcirculation in brain tissue and myocardium.

Study character:

Study funded by

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