# ECG artifacts **URL:** \ **Category:** Mailing List Archive (read-only)\ **Tags:** list-archive\ **Created:** [January 21, 2020, 1:37am UTC](https://mne.discourse.group/t/ecg-artifacts/2052 "2020-01-21T01:37:09Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [January 21, 2020, 1:37am UTC](https://mne.discourse.group/t/ecg-artifacts/2052/1 "2020-01-21T01:37:09Z")
External Email - Use Caution Hi All, I am new to MNE and am having some issues with identifying ECG artifacts, I have gone through the relevant tutorials and examples, but when I run the code the 'ecg\_epochs' image does not look how I would expect it to. I am using the mne.preprocessing.create\_ecg\_epochs function. Please see the image below. I have also tried the mne.preprocessing.find\_ecg\_events functions to no avail [cid:image001.png at 01D5D057.7EE66C20] Can anyone please point me to what I am doing incorrectly! I have checked the ECG channel, and it has very well defined PQRS waves, so I don't think it is an issue with that channel. Thanks, Siobhan O'Brien -------------- next part -------------- An HTML attachment was scrubbed... URL: [http://mail.nmr.mgh.harvard.edu/pipermail/mne\_analysis/attachments/20200121/a5481cde/attachment-0001.html](http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20200121/a5481cde/attachment-0001.html) -------------- next part -------------- A non-text attachment was scrubbed... Name: image001.png Type: image/png Size: 37765 bytes Desc: image001.png Url : [http://mail.nmr.mgh.harvard.edu/pipermail/mne\_analysis/attachments/20200121/a5481cde/attachment-0001.png](http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20200121/a5481cde/attachment-0001.png) ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [January 21, 2020, 7:18am UTC](https://mne.discourse.group/t/ecg-artifacts/2052/2 "2020-01-21T07:18:34Z")
External Email - Use Caution It doesn?t look like the ECG channel is being used because in the log it says: ?combining channels using ?mean?? You can use the ch\_name argument to provide the channel or alternatively set the channel type using raw.set\_channel\_types Mainak >         External Email - Use Caution > > Hi All, > > I am new to MNE and am having some issues with identifying ECG artifacts, > I have gone through the relevant tutorials and examples, but when I run the > code the ?ecg\_epochs? image does not look how I would expect it to. I am > using the mne.preprocessing.create\_ecg\_epochs function. Please see the > image below. I have also tried the mne.preprocessing.find\_ecg\_events > functions to no avail > > Can anyone please point me to what I am doing incorrectly! I have checked > the ECG channel, and it has very well defined PQRS waves, so I don?t think > it is an issue with that channel. > > Thanks, > > Siobhan O?Brien > \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ > Mne\_analysis mailing list > Mne\_analysis at nmr.mgh.harvard.edu > [Mne\_analysis Info Page](https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis) -------------- next part -------------- An HTML attachment was scrubbed... URL: [http://mail.nmr.mgh.harvard.edu/pipermail/mne\_analysis/attachments/20200121/e61ae5dc/attachment-0001.html](http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20200121/e61ae5dc/attachment-0001.html) -------------- next part -------------- A non-text attachment was scrubbed... Name: image001.png Type: image/png Size: 37765 bytes Desc: not available Url : [http://mail.nmr.mgh.harvard.edu/pipermail/mne\_analysis/attachments/20200121/e61ae5dc/attachment-0001.png](http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20200121/e61ae5dc/attachment-0001.png) ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [January 21, 2020, 11:53pm UTC](https://mne.discourse.group/t/ecg-artifacts/2052/3 "2020-01-21T23:53:36Z")
External Email - Use Caution Thanks Mainak, Sorry I probably should have shown the code I was using. Below is the code I am using - I do specify the channel accordingly. I have had a play around with the different options in plot\_image? and I get exactly the same graph when I remove combine = ?mean? and have no inputs to plot\_image. ecg\_epochs = mne.preprocessing.create\_ecg\_epochs(eeg\_data, event\_id=999, ch\_name = 'EKG') ecg\_epochs.plot\_image(combine='mean') Is there anything else you think it could be? Thanks for your help! Siobhan ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [January 22, 2020, 10:09am UTC](https://mne.discourse.group/t/ecg-artifacts/2052/4 "2020-01-22T10:09:43Z")
External Email - Use Caution Hi Siobhan -- no clue. If you can share your data along with a script that is no longer than 15 lines, I could perhaps try to help debug. It's hard to guess what could have gone wrong from two lines of code. Mainak >         External Email - Use Caution > > Thanks Mainak, > > Sorry I probably should have shown the code I was using. Below is the code > I am using - I do specify the channel accordingly. I have had a play around > with the different options in plot\_image? and I get exactly the same graph > when I remove combine = ?mean? and have no inputs to plot\_image. > > ecg\_epochs = mne.preprocessing.create\_ecg\_epochs(eeg\_data, event\_id=999, > ch\_name = 'EKG') > > ecg\_epochs.plot\_image(combine='mean') > > Is there anything else you think it could be? > > Thanks for your help! > > Siobhan > > \*From:\* mne\_analysis-bounces at nmr.mgh.harvard.edu \< > mne\_analysis-bounces at nmr.mgh.harvard.edu\> \*On Behalf Of \*Mainak Jas > \*Sent:\* Tuesday, 21 January 2020 6:19 PM > \*To:\* Discussion and support forum for the users of MNE Software \< > mne\_analysis at nmr.mgh.harvard.edu\> > \*Subject:\* Re: [Mne\_analysis] ECG artifacts > > \* External Email - Use Caution \* > > It doesn?t look like the ECG channel is being used because in the log it > says: > > ?combining channels using ?mean?? > > You can use the ch\_name argument to provide the channel or alternatively > set the channel type using raw.set\_channel\_types > > Mainak > > \* External Email - Use Caution \* > > Hi All, > > I am new to MNE and am having some issues with identifying ECG artifacts, > I have gone through the relevant tutorials and examples, but when I run the > code the ?ecg\_epochs? image does not look how I would expect it to. I am > using the mne.preprocessing.create\_ecg\_epochs function. Please see the > image below. I have also tried the mne.preprocessing.find\_ecg\_events > functions to no avail > > Can anyone please point me to what I am doing incorrectly! I have checked > the ECG channel, and it has very well defined PQRS waves, so I don?t think > it is an issue with that channel. > > Thanks, > > Siobhan O?Brien > > \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ > Mne\_analysis mailing list > Mne\_analysis at nmr.mgh.harvard.edu > [Mne\_analysis Info Page](https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis) > > \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ > Mne\_analysis mailing list > Mne\_analysis at nmr.mgh.harvard.edu > [Mne\_analysis Info Page](https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis) -------------- next part -------------- An HTML attachment was scrubbed... URL: [http://mail.nmr.mgh.harvard.edu/pipermail/mne\_analysis/attachments/20200122/3b3c892b/attachment-0001.html](http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20200122/3b3c892b/attachment-0001.html) -------------- next part -------------- A non-text attachment was scrubbed... Name: image001.png Type: image/png Size: 37765 bytes Desc: not available Url : [http://mail.nmr.mgh.harvard.edu/pipermail/mne\_analysis/attachments/20200122/3b3c892b/attachment-0001.png](http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20200122/3b3c892b/attachment-0001.png)