Title :
Hyper-Chaos and Singular Beats in Congestive Heart Failure
Author :
Li, Cheng ; Tang, Da-Kan ; Wu, Guo-Qiang ; Poon, Chi-Sang
Author_Institution :
Dept. of Mech. & Eng. Sci., Fudan Univ., Shanghai
Abstract :
Transient hyper-chaos with extraordinary high strength was observed in HRV of CHF patients by means of numerical titration method based on Volterra-Wiener series. In comparison with healthy subjects, RR series of CHF patients present sporadic impulses composed of normal, rather then premature beats. To illustrate such impulses and its relation to hyper-chaos, a sinoatrial node (SAN) model was developed. Simulations showed that high norepinephrine and low acetylcholine concentrations induced singularity in RR intervals and resulted in hyper-chaos. It is consistent with the high sympathetic and low parasympathetic tones in CHF.
Keywords :
Wiener filters; chaos; electrocardiography; medical signal processing; nonlinear filters; CHF HRV; CHF hyper chaos; CHF singular beats; RR interval singularity; RR series; Volterra-Wiener series; acetylcholine concentrations; congestive heart failure; heart rate variability; high sympathetic tones; low parasympathetic tones; norepinephrine concentrations; numerical titration method; sinoatrial node model; Chaos; Fractals; Hafnium; Heart rate variability; Noise level; Nonlinear equations; Resonant frequency; Spectral analysis; Storage area networks; Testing;
Conference_Titel :
Bioinformatics and Biomedical Engineering, 2008. ICBBE 2008. The 2nd International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1747-6
Electronic_ISBN :
978-1-4244-1748-3
DOI :
10.1109/ICBBE.2008.691
