HIGH-PASS FILTERING TO REMOVE ELECTROCARDIOGRAPHIC INTERFERENCE FROM TORSO EMG RECORDINGS
HIGH-PASS FILTERING TO REMOVE ELECTROCARDIOGRAPHIC INTERFERENCE FROM TORSO EMG RECORDINGS
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DOI：
10.1016/s0268-0033(05)80009-9
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发表时间：
1993-01-01
影响因子：
1.8
通讯作者：
CHAFFIN, DB
中科院分区：
文献类型：
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作者：
REDFERN, MS;HUGHES, RE;CHAFFIN, DB
去除来自躯干肌肉的肌电（EMG）信号的心电图（ECG）污染通常通过高通滤波来尝试。本研究探讨了高通滤波技术中使用的截止频率对所产生的肌电信号的影响。表面肌电图记录五个科目腹直肌，外斜肌，竖脊肌。然后，这些信号在10、30和60 Hz的截止频率下进行数字高通滤波。随后对过滤后的EMG进行积分和功率分析。发现截止频率的增加通过（1）减少ECG污染、（2）减小幅度和（3）平滑信号来影响积分EMG信号。得出的结论是，高通滤波器的使用是有效的，在减少心电图干扰的综合肌电图记录，和截止频率约30赫兹是最佳的。
Removal of electrocardiographic (ECG) contamination of electromyographic (EMG) signals from torso muscles is often attempted by high-pass filtering. This study investigated the effects of the cut-off frequency used in this high-pass filtering technique on the resulting EMG signal. Surface EMGs were recorded on five subjects from the rectus abdominis, external oblique, and erector spinae muscles. These signals were then digitally high-pass filtered at cut-off frequencies of 10, 30, and 60 Hz. Integration and power analyses of the filtered EMGs were subsequently performed. It was found that an increase in the cut-off frequency affects the integrated EMG signal by (1) reducing the ECG contamination, (2) decreasing the amplitude, and (3) smoothing the signal. It was concluded that the use of a high-pass filter is effective in reducing ECG interference in integrated EMG recordings, and a cut-off frequency of approximately 30 Hz was optimal.