Hardware settings for ECG

roiroi israel
in OpenBCI_GUI
I am trying to read ECG and for some reason  i only get a good signal when i set the input type to bianDrn.
can someone please explain the different input types?
also can someone recommend what are the best setting for recording 12 electrodes ECG. is it better to use SRB1 or SRB2? use BIAS?

Thanks
Roi Ramot

Comments

  • wjcroftwjcroft Mount Shasta, CA
    edited October 2018
    Roi, hi.

    Have you gone through the tutorial, which shows both ECG and EEG and EMG. Tutorials are here,


    "i only get a good signal when i set the input type to bianDrn."

    Can you explain 'bianDrn'? I don't get the reference.

    "also can someone recommend what are the best setting for recording 12 electrodes ECG. is it better to use SRB1 or SRB2? use BIAS?"

    Have you read up on the 12 lead ECG (10 electrodes)? These are not measured the same way as EEG. EEG uses a common reference, which by default is SRB2. Bias is the ground connection.

    ECG uses various polarities between the 10 electrodes. Which on a lab ECG machine would be done via a kind of internal switch box or signal processing. These are differential polarities. In the case of some of the measurements, the negative polarity is a Wilson or Goldberger terminal.


    William

  • wjcroftwjcroft Mount Shasta, CA
    The Bias is always connected to the right leg (RL) in clinical ECG. It's not used in the differential signal measurement. But acts like a ground to reduce noise and center the amps.
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