With increasing efficacy and safety of surgical techniques of myocardi
al revascularization prognostic accuracy of established predictors of
risk of mortality became insufficient. Predictive potential of paramet
ers of heart rate variability implicating mechanisms of regulation of
cardiovascular system was investigated in this study. Working characte
ristics of predictors of mortality in early period after coronary arte
ry bypass surgery were calculated and comparison of various risk facto
rs was conducted. Parameters of heart rate variability reflecting reac
tions of patients to really undergone stresses were better predictors
of mortality after coronary artery bypass surgery than left ventricula
r ejection fraction or NYHA functional class. High informative power o
f regression model incorporating low frequency power component of hear
t rate variability and estimate of the state of coronary vascularity w
as demonstrated.