How to Export an ECG Channel to a .txt File

Steps

1. Open EEGLAB in MatLab (type “eeglab” in MatLab and hit enter)

2. In EEGLAB, go to “file” → “import” → “using EEGLAB functions and plugins” → “import Phillips .mff file”

3. Select the mff file of the ECG recording you want to import

4. For trigger/event type select “code”

5. Go to “plot” → “channel data (scroll)” and check to see what channel number corresponds to the ECG channel (usually channel 66). You should be looking for a QRS wave signal

6. Go to “edit” → “select data” and enter the ECG channel number into “channel range”

7. Save the new data set

8. Confirm the right channels were removed by navigating to “plot” → “channel data (scroll)”

9. Then go to “file” → “export” → “data and ica activity to text file”

10. Make sure the only boxes checked are “transpose matrix (elec → cols)” and “use comma separator (csv) instead of tabs”. All other boxes should be unchecked.

11. Enter the file name with a proper title (should end in .txt) and select the proper folder destination

12. Wait until the file is finished uploading before closing MatLab

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