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Effect of ECG signal factor

The characteristics of the ECG signal is affected by the ECG signal superimposed on a lot of burr, serious when can not be observed in QRS wave group.
The main reasons are as follows:
1, not to filter the interference waveform
2 electrosurgical equipment, interference
3, ECG electrodes not settled
4, the repeated use of disposable dianjipia expired
5, the skin excessive hair, dander to relieve adverse electrode
6, EMG or motion interference
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