  In this paper we consider the age-related alterations of heart rate
variability on the basis of the study of non-Markovian effects. The age
dynamics of relaxation processes is quantitatively described by means of local
relaxation parameters, calculated by the specific localization procedure. We
offer a quantitative informational measure of non-Markovity to evaluate the
change of statistical effects of memory. Local relaxation parameters for young
and elderly people differ by 3.3 times, and quantitative measures of
non-Markovity differ by 4.2 times. The comparison of quantitative parameters
allows to draw conclusions about the reduction of relaxation rate with ageing
and the higher degree of the Markovity of heart rate variability of elderly
people.
