[Heart rhythm variability during neuro-psychological stress].

The paper gives the results of studying heart rhythm variability in medical students during their study at a higher educational establishment with regard to the typological features of the autonomic nervous system. Significant diferences have been found in both the temporal and spectral parameters of heart rhythm in relation to the dominance of the autonomic nervous system and the time of their studies. Analysis of heart rhythm variability could estimate the total activity of regulatory mechanisms and the ratio between the sympathetic and parasympathetic autonomic nervous systems in the students during their study.