What does ECG filter 50hd100hz mean?

Represents the cutoff frequency of the filter. The former means that the alternating current 50HZ is converted into 35HZ after full-wave rectification, and the latter means that the alternating current 50HZ is converted into 100Hz after full-wave rectification. 50Hz and 100Hz of ECG filter respectively indicate the cut-off frequency of the filter, which is used to remove unnecessary interference signals in ECG signals. In ECG examination, using these filters can improve the signal quality and reduce the misdiagnosis rate. ECG filters can also be divided into low-pass filters, high-pass filters, band-pass filters and band-stop filters according to filter types. Low-pass filter can remove high-frequency signals, high-pass filter can remove low-frequency signals, band-pass filter can selectively retain signals in a certain frequency band, and band-stop filter can selectively remove signals in a certain frequency band.