Summary form only given. Heart rate variability (HRV) is animportant marker in the diagnostics of some diseases associated withautonomic nervous system (ANS) dysfunctions. One of the advanced methodsis the spectral analysis of heart rate variations (SAHRV). Earlydiagnosis of ANS disfunction is very important from the point of view ofprevention and subsequent therapy. This fact served for the authors as astarting point in the development of diagnostic systems enabling thetelemetric transfer of data defining the size of R-R intervals of ECGsignals with a precision of 10-3 s. The system involves anadjustable chest belt with integrated electrodes, and a transmitter andreceiver of coded IR radiation or a coded RF signal. The receiver isconnected to an IBM AT PC. The system is completed by software allowingthe determination of the ANS state during special examinations, i.e. theEwing's battery of cardiovascular tests and short-time spectral analysisof HRV. The calculation of SAHRV parameters is performed according tocoarse-grained spectral analysis, with optimum suppression of the noisecomponent of the analysed signal. The result of the analysis is a numberof parameters describing the present state of both ANS subsystems(sympathetic and vagal) and a 3D graphic output showing the dynamics ofANS activity changes in the course of whole test. The present experienceof VariaPulse application shows the possibilities of its use both indaily medical practice and under conditions of experimental work. It canbe applied in cardiology, diabetology, neurology, sport medicine, etc
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