Fuzzy Modelling of Heart Rate Variability

Abstract

Heart rate, actual blood pressure, blood flow rate and other cardiovascular parameters fluctuate in their values even in quite steady physiological state. Unlike the earlier conception has been proved that these fluctuations are to be viewed as specific symptoms of heart performance control. Based on this idea a model of brain interventions into control strategy of heart is presented (consisted of fuzzy blocks, integration blocks and delays) performing "beat by beat" control principle and resulting in Heart rate variability signals with features of deterministic chaos. The model is implemented in MatLab/Simulink environment.