Abstract

Abstract Summary

Overview

The study investigates the effects of a geomagnetic storm, previously recorded, on the human cardiovascular system and microcirculation using a controlled laboratory setting.

Methodology

Participants were healthy volunteers positioned in a lying posture and subjected to two simulated conditions:

• Quiet (Q): A simulation of a noise-free magnetic field similar to natural geomagnetic conditions at Moscow's latitude.
• Storm (S): A playback of the initially recorded 6-hour geomagnetic storm, repeated four times sequentially.

Findings

Effects of these conditions were monitored by:

• Measuring capillary blood velocity (CBV) and blood pressure (BP).
• Analyzing a 24-hour ECG recording.
• Comparing storm-to-quiet ratios for cardio intervals (CI) and heart rate variability (HRV).
• Utilizing autocorrelation function analysis of the high-frequency (HF) part of the CI spectrum to estimate individual sensitivity to the geomagnetic storm.

Conclusion

This unique setup allowed detection of significant differences in HRV and a subgroup of subjects with differing autocorrelation functions (ACF) responses under the two exposure regimes.