ISSN 0869-6632 (Print)
ISSN 2542-1905 (Online)


heart rate variability

Complex structure and nonlinear behavior of very low frequency of heart rate variability: model of analysis, and practical applications

Researched the structure of Very Low Frequency (VLF) spectrum of heart rate variability (HRV)  and its nonlinear behavior in a relationship with the energy of oscillations, baroreflex and parasympathetic activity at functional tests of low intensity in 100 subjects (seven-test, deep breathing), including active orthostatic test of 32 subjects with orthostatic tachycardia in comparison to the control group of 20 subjects. There were three stages of research. The first  stage: created the method of spectral analysis of separate components of VLF.

Entropy and dfa of heart rate variability in remote ischemic preconditioning, orthostatic test in healthy young subjects and in individuals with changes in autonomic regulation of cardiodynamics

There was conducted the research of comparative physiological assessment in nonlinear analysis methods of heart rate variability (HRV): the approximate entropy (ApEn), sample entropy (SampEn), multiscale entropy (MSE) and detrended fluctuation analysis (DFA) in case of remote ischemic preconditioning (RIPC) and orthostatic test both in healthy young subjects and individuals with autonomic regulation imbalance.