# ICA - ECG Components **URL:** \ **Category:** Support & Discussions\ **Tags:** preprocessing, eeg, ica\ **Created:** [October 27, 2022, 1:30am UTC](https://mne.discourse.group/t/ica-ecg-components/5817 "2022-10-27T01:30:43Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![lmctx13](https://avatars.discourse-cdn.com/v4/letter/l/dbc845/32.png) [@lmctx13](https://mne.discourse.group/u/lmctx13)\ **Post date:** [October 27, 2022, 1:30am UTC](https://mne.discourse.group/t/ica-ecg-components/5817/1 "2022-10-27T01:30:43Z")
Hi everyone, I have another question about ICA. I am working with EEG recordings in which ECG/EOG channels were included. In some of these recordings, the ECG channel records heartbeats with downward peaks instead of upward peaks. I have attached screenshots to explain what I mean by downward and upward peaks. ECG channel with upward peaks: ![upward](https://global.discourse-cdn.com/free1/uploads/mne/original/2X/5/5573c427ec483bd199af327ed74bbb5156b99550.png) ECG channel with downward peaks: ![downward](https://global.discourse-cdn.com/free1/uploads/mne/original/2X/3/3931be3c6b5c96da57c161cf26880a287c65b08a.png) Would the ECG channel need to have heartbeats with upward peaks for the independent components (containing ECG artifacts) to be properly identified? Information: - MNE version: 1.0.3 - operating system: Windows 11 Thank you! ---
**Author:** ![agramfort](https://avatars.discourse-cdn.com/v4/letter/a/7c8e57/32.png) [@agramfort](https://mne.discourse.group/u/agramfort)\ **Post date:** [October 27, 2022, 7:28am UTC](https://mne.discourse.group/t/ica-ecg-components/5817/2 "2022-10-27T07:28:54Z")
I think it should work either way Alex ---
**Author:** ![lmctx13](https://avatars.discourse-cdn.com/v4/letter/l/dbc845/32.png) [@lmctx13](https://mne.discourse.group/u/lmctx13)\ **Post date:** [November 4, 2022, 5:36pm UTC](https://mne.discourse.group/t/ica-ecg-components/5817/3 "2022-11-04T17:36:08Z")
Perfect, thank you so much.