What should I do to get ECG_Q_Peaks and ECG_S_Peaks?

[sdujicun]

When I used the following two lines of code,
_, waves_peak = nk.ecg_delineate(ecg_signal, rpeaks, sampling_rate=3000)
plot = nk.events_plot([waves_peak['ECG_T_Peaks'],
waves_peak['ECG_P_Peaks'],
waves_peak['ECG_Q_Peaks'],
waves_peak['ECG_S_Peaks']], ecg_signal)

an error exist "KeyError: 'ECG_Q_Peaks'".

What should I do to get ECG_Q_Peaks and ECG_S_Peaks?

[Tam-Pham]

Hi @sdujicun,

Currently nk.ecg_delineate() has a derivative method and two other wavelet-based methods. The default method is method="dwt" (discrete wavelet method) and unfortunately, the returns of this method only include P-peaks, T-peaks, P-onsets, P-offsets, T-onsets, T-offsets. For Q-peaks and S-peaks, you can use the derivative method instead (method="peak").

The detailed description of the outputs (returns) can be found in our documentation of the function here

hope that helps!

[sdujicun]

Thanks a lot. Following the suggestion, my problem has been solved