Neurokit2 ecg_delineate detects wrong R onsets and offsets

[sanketahegde]

Hi,

I am working some MIMIC ECGs which are 10 second each and have a sampling rate of 500Hz with total 5000 data points for every lead. I applied ecg_clean followed by ecg_peaks and used the required results in ecg_delineate. Everything works decently except for R_Onsets and R_Offsets. The R_Onset is detected very near to the P peak and R_Offset is detected sometimes correct but most of the time detected before the S peaks. I am mainly trying to calculate ecg-related intervals and for PR interval I need the correct R_Onsets.

Find some examples below:

I also compared the PR interval calculated with the help of Neurokit2 against the original values from the ECG metadata and I get,
PR_interval_orig = 130 msec
PR_interval_neurokit = 52 msec

Is there a way I could overcome this problem with already available Neurokit functions or appreciate some suggestions for a workaround.

Thank you!

[welcome]

Hi 👋 Thanks for reaching out and opening your first issue here! We'll try to come back to you as soon as possible. ❤️

[YmirKhang]

I am experiencing the same issue with low-resolution single-lead ECG data. I am willing to also help out if we can identify the problem.