The research goal is to study the correlation between indices of variational pulsometry, entropy of heart rate, temporal and spectral analyses and heart rate variability in healthy patients and patients with coronary heart disease. Materials. Of the study are indicators of variational pulsometry and temporal and spectral analyses from 111 patients with coronary heart disease and in 61 healthy individuals. Results. Most parameters of HRV correlated with each other. In healthy patients the greatest independence was characterized by Mo and LF/HF, in patients with coronary artery disease — only by LF/HF Significant correlation with SDNN RMSSD, TP, LF, HF was determined. Conclusion. The variational pulsometry, temporal and spectral analyses of HRV and entropy of heart rate provide HRV assessment. The indices are interdependent and indicate interchangeability of methods
Durnova N.Yu., Dovgalevskiy Ya.P., Burlaka A.N., Kiselev A. R., Furman N.V. Interdependence of parameters of varia-tional pulsometry, entropy of heart rate, temporal and spectral analyses of heart rate variability in normal state and in ischemic heart disease // Saratov Journal of Medical Scientific Research, Vol. 7, Issue 3, 2011, pp. 607-611

The new approach in an estimation of spectral properties of wavelets is offered in work. With use of computer algebra the analytical decision of a problem of definition of "effective" frequency and amplitude of wavelets on the basis of the variation approach is received.