shifting polarity ECG ? [resolved]
SumangalaKH
India
I am using Ganglion board (3 leads on 4th channel) and have followed the connections as per the OpenBCI Ganglion ECG Setup Documentation for ECG Signal. The electrodes connected to wrist as per the video i,e Channel-4 positive electrode to left wrist position. D_G and channel-4 negative electrode connected to right wrist position.
Observed that R peak is switching between positive polarity to negative polarity and vice versa.
Please let me know possible causes for the behaviour
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Comments
What electrodes, stick on, other? Have you tried the stick on electrodes at the left and right chest locations? Same as RA LA in the diagram.
https://docs.openbci.com/GettingStarted/Biosensing-Setups/ECGSetup/#connect-the-electrodes-to-your-body
Hi,
Thanks for the response. Yes, am using sticky electrodes. ECG Signal at chest seems to be OK. But facing issue while electrodes placed on the wrist location.
The 'standard' used in medical clinics is the chest positioning. Is it possible that your wrist positions may be causing a weaker signal? Also, commonly in clinics, the locations for application of the adhesive electrodes, are first cleansed of skin oils, etc., with some isopropyl alcohol.