A. A. Kuznetzov, A. A. Plehanov, L. T. Sushkova

The general research direction concerns to development of methods pre-nozological diagnostics of the healthy person physiological condition and search of the form of a heart rhythm reference diagram (HRD). The heart rhythm contains chaotic and deterministic components. Virtual HRD, formatted by result of generation of random numbers under the normal law, has strong qualitative divergences in frequency areas of research with real pair HRD. The purpose of work is creation synthesized diagram (SD), having cumulative RR-diagram, R-diagram and PPG- trend diagram frequency characteristics. A problem of parallel research is check of an opportunity of reduction of a required memory size at associative representation of the full frequency information in the SD form. Researches were carried out on a hardware-software complex "electrocardiograph and photopletizmograph", capable to make syn-chronous record of electrocardiograms (ECG) and photopletizmograms (PPG) and the automated program complex ( APC EKG-FPG). Three parameters values digital lines, representing discrete functions RR-diagram RR (n), R-diagram R (n) and PG- trend diagram FPG (n) are received. The technique and the settlement circuit of formation SР and combined diagram (CD), modeling a heart rhythm on spectral similarity in two ranges of frequencies 0...0,15 Hz and 0,15...0,5 Hz, accordingly is offered. Formulas of SР and CD generation allow forming nonlinear models of a heart rhythm, based on rhythm variability representation by a variable on size time intervals sequence of external influences delays.