Abstract
The autonomic nervous system influences heart rate variability. The sympathetic and parasympathetic nervous system are usually the principal systems in short-term cardiovascular control. We analyzed the ΔR-R intervals of electrocardiogram using autoregressive model (AR model) to evaluate the autonomic nervous system function which influence the atrio-ventricular node.
The parasympathetic nervous system is dominant at supine position and the sympathetic nervous system is dominant at standing position. Therefore we compared the first degree functional atrio ventricular block (AV-block) group with the control group at supine position and standing position.
The control group (60 normal subjects) were compared by discriminant function test using AR-coefficients as variables. The control group were discriminated at standing position (p<0.01). Analysis of heart rate variability using AR model is useful to estimate the balance of the sympathetic and parasympathetic nervous systems.
