Инд. авторы:	Grishin O.V., Grishin V.G., Yu Uryumtsev D., Smirnov S.V., Jilina I.G.
Заглавие:	Metabolic rate variability impact on very low-frequency of heart rate variability
Библ. ссылка:	Grishin O.V., Grishin V.G., Yu Uryumtsev D., Smirnov S.V., Jilina I.G. Metabolic rate variability impact on very low-frequency of heart rate variability // World Applied Sciences Journal. - 2012. - Vol.19. - Iss. 8. - P.1133-1139. - ISSN 1818-4952. - EISSN 1991-6426.
Внешние системы:	DOI: 10.5829/idosi.wasj.2012.19.08.661; РИНЦ: 20490465; SCOPUS: 2-s2.0-84868712609;
Реферат:	eng: There is an opinion that the very-low-frequency (VLF) fluctuations of heart rate's variability (HRV) have been associated with energetic process in organism. The background of this study was the hypothesis that VLF variability of respiratory pattern (VRP) is influenced by oxygen consumption (VO 2) regulation. However, it is still unclear: is there a correlation between those processes? The goal of this study was to investigate the HRV, rhythms of pulmonary gas exchange and the variability of the respiratory pattern, as well as to find their possible relation. In search for periodicities in the variability spectral analysis was applied to breath-to-breath variables of oxygen consumption (VO 2), CO 2 production (VCO 2), end-tidal CO 2(FetCO 2), lung ventilation (Ve) and breath frequency (f) in 19 healthy subjects at rest. Simultaneously HRV was investigated by pulse-oximetry method. The interbeat pulse intervals (Tpi) were calculated on-line using an R-wave peak detection algorithm. VRP was defined by pneumography method. Spectral analysis carried out using the fast Fourier transform (FFT) revealed two groups of peaks: the first one was in the range from 0.2 to 0.3 Hz (the time interval of 3-5 s), which was in good agreement with the breath frequency (f); the second was from 0.002 to 0.0075 Hz, which corresponded to the VLF band. Both groups of peaks were in same bands for all indices detected three different methods. The data makes it possible to draw a conclusion about the stability of the wave processes found that may be described as 'metabolic rate variability'. We are concluded that very-low-frequency variability of HRV and VRP are regulated by common mechanism of the metabolic control. It is possible that the mechanism has metabolic rate variability. © IDOSI Publications, 2012.
Ключевые слова:	Vlf band; Variability of respiratory pattern; Pulmonary gas exchange; Metabolic rate variability; Heart rate variability;
Издано:	2012
Физ. характеристика:	с.1133-1139