[High frequency component of heart rhythm]

The heart rhythmogram was studied which was drawn according to the sphygmogram and R-R peaks of the electrocardiogram. Autocorrelation analysis of the high frequency component of the rhythmogram showed the presence of the rhythm with the period of 2 cardiointervals (27) in it, which is expressed on the autocorrelation function curve by a negative value of the correlation coefficient at the first shift. The calculation of the wave dispersion with period 2T in comparison with the waves of other period showed that their power is rather great and comparable to the show wave power of the I or II orders (with the period 10 + 20 or 30 + 50 s respectively). The rhythm with the period of 2 cardiointervals is probably connected with the governing system of the heart of a lower level.