Effect of Wireless Network Radiation on Heart Rate Variability
Keywords:
HRV, DFA, ApEn, electromagnetic radiation exposure.Abstract
The health risk associated with the increased
exposure to wireless network devices like Mobile Phones, Wi-Fi
etc, had been area of concern. In this paper, the effects of
wireless network radiations (WNR) on Heart Rate Variability
(HRV) had been investigated. The two non-linear indices
namely i) Approximate Entropy (ApEn) ii) Detrended
Fluctuation Analysis (DFA) had been used for deciphering the
hidden dynamics of HRV. The study comprised of 19 healthy
male subjects in the age group of 23±4.3 (mean ± std dev) years.
The Electrocardiogram (ECG) of each subject obtained under
three different WNR exposure modes namely i) Least or
minimum exposure: when WNR level is 0.49±0.12 mW/m2 ii)
Moderate exposure: when WNR level is 2.08±0.27 mW/m2 iii)
Maximum or calling mode exposure: when WNR level is
1.65±0.32 W/m2. The results indicate that there is a significant
increase in DFA scaling exponent when the WNR level changed
from minimum to maximum value, as p-value <0.05, whereas
the change in mean value of ApEn was not significant due to
higher standard deviation among all the subjects. The WNR
exposure caused changes in HRV indices and it varied with
WNR level, but all the changes cannot be considered as p values
were higher.
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