The Evaluation of the Mobile Phone Effect on the Heart Rate Variability by Lyapunov Exponent Calculation

In this work, the effect of the electromagnetic radiation generated by mobile phone calling, on the heart rate variability (HRV) has been investigated using nonlinear analysis method. The electrocardiogram (ECG) signals were recorded from 10 volunteer subjects in the sitting position for 5 minutes when mobile phone is open and standby. The process was repeated same conditions while calling the mobile phone, continuously. The largest Lyapunov exponent (LLE) calculation was performed on the HRV obtained from ECG signals. The paired student-t test was applied on the LLE values. The calculating LLE values for the calling condition of mobile phone were found higher than the values belonging to the standby condition of the mobile phone (p<0.05). The results show that the chaotic dynamics of cardiovascular system behavior increase by reason of electromagnetic radiation generated by mobile phone.