Monday, March 29, 2021

Polar H10 ECG tracing - a short how to guide

Multiple previous posts in this blog have examined the Movesense Medical module and HR plus in terms of single lead ECG devices.  At a relatively moderate cost, they are able to provide accurate HRV and rhythm analysis using the premium version of Kubios software.  However, what if you just had a Polar H10 and wanted to see what your ECG rhythm looked like - could you do it?  Thanks to a comment on the blog by "Spookymuggs", I believe it can be done.  

Here is what the output looks like on an S21:


Pretty cool!

Requirements: Polar H10, spreadsheet program like Excel (for a long session), Polar Sensor Logger App for android

Shortcomings: Kubios free will not process the data, sample rate is only 125 Hz - inadequate for DFA a1 precision

Instructions:

  • Install the Polar Sensor app, wear the H10 HRM
  • Open the app, choose your device, pick ECG as the output type, hit start.

 

  • To see the above graph, scroll to the right under graphs and it should show.  
  • When you press "stop" you can save the file to your storage to view in Excel.
  • Locate the file and open it with a spreadsheet program.
  • Just plot time x voltage:

How does it look in Kubios (premium):

  • An APC is easily spotted in this strip of mine
  • Seems reasonable for rhythm - APC, VPC, etc


And the waveform:

  • Not great.

Is it Kubios' fault? No.  Here is a view in the android app, magnified:

 
  • You can only get so much resolution out of this low sample rate.

 

Comments:

  • Yes, we can get a rhythm strip from a Polar H10 with just an android app.
  • Detecting severe arrhythmia's should not be too difficult for those familiar with reading these tracings.
  • To get either HRV or aberrant beat detection, you still need Kubios premium.
  • Low sample rate makes DFA a1 determination a questionable no go.
  • For those who think they are having abnormal beats and don't have a medical background, YMMV.


Heart rate variability during dynamic exercise


 


6 comments:

  1. I'm interested to know what makes your APC highly visible, the wave form looks all the same to my untrained eyes

    ReplyDelete
    Replies
    1. The APC comes early and has a normal waveform - https://litfl.com/premature-atrial-complex-pac/

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  2. I have just found that there is a polar app that will show ecg trace as well... the thing is it is for horses! Shows a live RR interval as well.

    https://support.polar.com/en/polar-equine-app-features?product_id=38589&category=features

    ReplyDelete
  3. the polar equine works! Perfectly.
    Now i need software that analyses the ecg output..

    ReplyDelete
    Replies
    1. Great to hear. Kubios premium will work, but if you find anything else low cost, let me know

      Delete