A.B. Simakov - Ph.D. (Eng.), Head of Research Laboratory, National Research Nuclear University «MEPhI», Moscow, Russia. E-mail: absimakov@mephi.ru Yu.I. Bocharov - Ph.D. (Eng.), Associate Professor, National Research Nuclear University «MEPhI», Moscow, Russia. E-mail:YIBocharov@mephi.ru B.V. Zhuravlev - Dr.Sc. (Med.), Professor, P.K. Anochin's institute of normal physiology, Moscow, Russia. E-mail: b.zhuravlev@nphys.ru B.V. Gurkovskiy - Junior Research Scientist, P.K. Anochin Institute of Normal Physiology, Postgraduate National Research Nuclear University «MEPhI», Moscow, Russia. E-mail: b.gurkovskiy@nphys.ru I.N. Vodokhlebov - Leading Engineer, National Research Nuclear University «MEPhI», Moscow, Russia. E-mai:invodokhlebov@mephi.ru

Traditionally, it was assumed, that low power telemetry transmitters had no effect on the human cardiovascular system (CVS). However, in the last decade it was shown that even weak electromagnetic fields (EMF) change individual cardiogram parameters.The study involved 25 volunteers in compliance with all ethical standards and safety regulations.The each of them was located in a well-shielded room and was irradiated in a blinded fashion by externally controlled microwave field within the range of GSM-900 mobile communications standard (890 - 960 MHz; the energy flow less than 50 μW/ cm2). Simultaneously a cardio-interval-gram (CIG) was recorded, and then processed using the advanced methods of heart rate variability (HRV) analysis. The experimental researches have shown: there are no HVR changes at the transmission time less 1 min; the 70% of subjects had tachycardia at 1 till 3 minutes irradiation; almost 86% of the subjects had the individual drift of HRV and for 28% of them the drift did not disappear in five minutes after exposure. Therefore, it is possible to reduce of bio-radio-telemetry artifacts by preliminary accumulation of the data and by transmitting them using the pulsed mode with a large duty cycle. This work was supported by the Russian Scientific Found under Grant № 16-19-00167.