Telemetric, computer aided system for non-invasive examination of heart rate variability, type VariaPulse TF 3

The authors present hardware and software which enables one to enlarge the practical application of the method of spectral analysis of R-R intervals variability, used for the evaluation of heart rate regulation in which autonomic nervous system and sympathetic and vagal effects play an important role. This developing method, applied and verified by many authors, is at present realized with the help of expensive monitoring systems, which prevents its more general use. To solve the problem, the authors used a microcomputer measuring system, type TF-3, with telemetric transfer of values of R-R intervals, equipped with special software including the procedures of measuring, filtration and calculation of parameters of spectral analysis. The results of analyses make it possible to depict and quantify the manifestation of factors influencing the variability of heart rate, including the sympathetic and vagal effects and their relationship during the specified functional load, drug application etc.