Abstract
Background: The electromagnetic radiations emitted by cellular telephones may influence the autonomic tone which modifies the functioning of the circulatory system. Aim and Objectives: To estimate the effect of using mobile phones on heart rate variability (HRV) in first year medical students. Method: ECG and HRV parameters are recorded in three periods, - when the subject is at rest without mobile phone (Period-I), with mobile phone kept on the left chest (Period-II) and when responding to a call by keeping the mobile over his right ear (Period-III) on 100 healthy subjects aged between 18 and 21 years of either sex.Results:When the mobile was kept on chest or while attending a call,a decrease in high frequency (HF) in normalized units and increase in low frequency (LF) in normalized units and increase in the ratio of LF to HF (LF/HF) was observed in the frequency domain measures. Decrease in RR intervals, RMSSD and NN50 was observed in the time domain measures . Conclusion: The participants showed a higher sympathetic tone and a lower parasympathetic tone while attending a call. The study proved the intense effects of handset radiofrequency radiations on autonomic balance in healthy subjects.
Highlights
Recent years have witnessed unprecedented increase and ubiquitous use of mobile phone and enormous attention about its ill effects on human health
Is demanded for the communications purposes 1 .The intense use of mobile phones has led to cardiac disorders, malignancy, infertility,sleep disturbances, headaches, memory problems, and nervous disorders like changes in the electroencephalographic activity and brain tumours on long term usage
Since heart is an electrically excitable tissue, more research is required to assess its susceptibility to radio-frequency electromagnetic radiation (RF-Electromagnetic Fields (EMF))
Summary
Recent years have witnessed unprecedented increase and ubiquitous use of mobile phone and enormous attention about its ill effects on human health. Electromagnetic fields emitted by cellular phones interfere with the work of cardiac pacemakers and other implantable medical devices 2,3. Electromagnetic waves are non-ionizing radiations which causes tissue heating or induce electrical currents in tissues which is the principal mechanism of interaction. International Journal of Physiology, January-March 2020, Vol 8, No 1 73 between radiofrequency energy and the human body Tissue heating is the best-established mechanism for RF radiation induced effects in biological systems[4]. The electromagnetic radiations emitted by cellular telephones may influence the autonomic tone which modifies the functioning of the circulatory system
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