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晚电位是ECG中幅度很小的高频信号,出现在ORS复合波之后,与心室节律有关。传统的常规ECG无法检测晚电位信号,一般要采用信号平均技术和滤波技术来进行检测。本文比较了两类滤波器对ECG进行滤波和平均的性能:一类是截止频率为40Hz的高通双向递归型数字滤波器;另一类是截止频率为60Hz的高通付里叶变换非递归式数字滤波器。实验表明,这两种滤波方法得到的结果有着很强的相关性。
Late potential is a very small high-frequency ECG signal, appear in the ORS complex, and ventricular rhythm. Traditional conventional ECG can not detect late potential signal, the signal to the average and filtering techniques are generally used to detect. This article compares the performance of two types of filters for filtering and averaging ECGs: one is a high-pass bidirectional recursive digital filter with a cut-off frequency of 40 Hz; the other is a high-pass Fourier transform non-recursive number with a cutoff frequency of 60 Hz filter. Experiments show that the results obtained by these two filtering methods have a strong correlation.