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:
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
- 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.
- 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.