Instantaneous Bispectral Characterization of the Autonomic Nervous System through a Point-Process Nonlinear Model
Assessment of Heartbeat nonlinear dynamics is an important topic in the study of cardiovascular control physiology.In this paper,we introduce an inverse-Gaussian pointprocess model where an input-output Wiener-Volterra model is linked to a quadratic autoregression within the probability structure in order to estimate the dynamic spectrum and bispectrum of the considered heartbeat dynamics.The proposed framework was tested with an experimental ECG dataset with subjects undergoing a tilt-table procedure.Results show that our model is useful in estimating previously defined instantaneous indices of heart rate (HR) and heart rate variability (HRV).Results demonstrate that the algorithm confirms the characterization of the tilt effect on standard and instantaneous indices of the sympatho-vagal balance,while simultaneously tracking significant changes in the inherent nonlinearity of heartbeat dynamics with tilt.
Heart Rate Variability (HRV) Point Process High Order Statistics Bispectrum Nonlinear Analysis
G. Valenza L. Citi E.P. Scilingo R. Barbieri
Interdepartmental Research Center E. Piaggio and Department of Information Engineering, University o Neuroscience Statistics Research Laboratory, Harvard Medical School, Massachusetts General Hospital, Interdepartmental Research Center E. Piaggio and Department of Information Engineering, University o
国际会议
World Congress on Medical Physics and Biomedical Engineering (2012年医学物理及生物医学工程国际会议(IFMBE))
北京
英文
530-533
2012-05-26（万方平台首次上网日期，不代表论文的发表时间）