Khadra L, Dickhaus H, Lipp A
Department of Electrical Engineering, Jordan University of Science and Technology, Irbid.
J Med Eng Technol. 1993 Nov-Dec;17(6):228-31. doi: 10.3109/03091909309006330.
It is shown that time frequency signal analysis could be a useful technique in detecting late potentials (LP). In particular, the spectrogram, the Wigner distribution and the wavelet transform have been applied to ECG signals from patients with sustained ventricular tachycardia. Comparisons of the three algorithms reveals that much better time localization is achieved by the wavelet transform. Moreover, it is concluded that a separation between healthy subjects and patients could be obtained based upon time frequency analysis.
结果表明，时频信号分析可能是检测晚电位（LP）的一种有用技术。特别是，频谱图、维格纳分布和小波变换已应用于持续性室性心动过速患者的心电图信号。对这三种算法的比较表明，小波变换能实现更好的时间定位。此外，得出的结论是，基于时频分析可以区分健康人和患者。
