期刊名称：International Journal of Computer Science Issues
印刷版ISSN：1694-0784
电子版ISSN：1694-0814
出版年度：2012
卷号：9
期号：1
出版社：IJCSI Press
摘要：A new method of characterization of patient Electrocardiograms(ECG) suffering from Sudden Cardiac Death (SCD) permits to confirm the role of lower order higher harmonics when approaching the moment of SCD instant. Besides, several peak amplitudes are detected during the normal heart beat oscillations preceding such cardiac arrest. Abrupt qualitative changes often encountered in the behavior of nonlinear dynamical systems may be regarded as analogous to the main features of the changing dynamics of the heartbeat. Indeed, under certain circumstances, the heart rhythm oscillations may undergo an abrupt change in frequencies and amplitudes of spectral lines. A sliding window FFT performed on ECGs of two patients suffering from Sudden Cardiac Death, leads to put into evidence the reorganization of the higher harmonics involving changes in their ranks and their amplitudes.
