Analysis of diaphragm EMG signals: Comparison of gating vs subtraction for removal of ECG contamination
Analysis of diaphragm EMG signals: Comparison of gating vs subtraction for removal of ECG contamination
复制标题
DOI：
10.1152/jappl.1996.80.6.1898
复制
发表时间：
1996-06-01
影响因子：
3.3
通讯作者：
Goldman, E
中科院分区：
文献类型：
--
作者：
Bartolo, A;Roberts, C;Goldman, E
膈肌电图（EMGdi）传递有关呼吸机制的信息；然而，心电图（EGG）污染会损害从该信号获得的数据的准确性。我们通过植入电极检查麻醉下自主呼吸的狗的EMGdi记录，以评估ECG污染引入的误差程度以及ECG门控在减少这种误差方面的有效性。由于ECG减法已被证明可以在此类应用中产生准确的结果，因此它被用作金标准。采用方差分析方法，将心电相减后的EMGdi数据与原始数据和心电门控后的结果进行比较。使用减法和门控技术获得的EMGdi变量估计值没有显著差异，表明可以对这些信号采用门控来减少心电污染，而不会影响导出数据的准确性。结果还表明，在肌电与心电功率比为13.3 dB时，心电污染对EMGdi变量的估计没有显著影响。
The diaphragm electromyogram (EMGdi) conveys information relating to the mechanisms of respiration; however, electrocardiogram (EGG) contamination can compromise the accuracy of data derived from this signal. We examine the EMGdi recorded from anesthetized spontaneously breathing dogs via implanted electrodes to assess the extent of the error introduced by the ECG contamination and the effectiveness of ECG gating in reducing this error. Because ECG subtraction has been shown to generate accurate results for such applications, it is used as the gold standard. Analysis of variance methods are employed to compare results derived from the EMGdi data after ECG subtraction with corresponding results derived from the original data and from the data after ECG gating. Estimates of EMGdi variables obtained by using subtraction and gating techniques were not significantly different, indicating that gating can be employed on these signals to reduce ECG contamination without affecting the accuracy of the derived data. Results also show that at EMG-to-ECG power ratios >13.3 dB, ECG contamination does not significantly affect estimates of the EMGdi variables.