TEMPORARY FLUCTUATIONS OF HEART RATE VARIABILITY SPECTRAL INDICES IN
HEALTHY VOLUNTEERS

A. L. Kulik1, O. K. Zaderykhin2, V.I. Shulgin2, A.V. Martynenko1, 
N. I. Yabluchansky1
1 Medical Faculty of Kharkov National University named by 
V. N. Karazin, Ukraine
2 National Aerospace University named by N. E. Zhukovskii «Kharkov 
Aviation Institute», Ukraine


In 20 healthy volunteers aged from 19 to 30 years (7 men and 13 women)
the patterns  of  temporary  fluctuations  of  total power of spectral 
indicators  (TP, VLF, LF and HF)  heart rate variability (HRV) using a 
one-minute buffer during spontaneous  breathing were  studied.  It was 
found that temporary fluctuations of total power of HRV spectral indi-
ces in healthy volunteers are slow waves with frequency of 0,05–0,07Hz.
These  fluctuations  qualitatively  and  quantitatively are similar to 
each other. Their nature allows to associate them primarily with meta-
bolic reactions of the organism.

Key words:  heart  rate  variability,  fast Fourier  transform,  human 
physiology.