The height of the lines are just the amount of signal it's picking up from your fingerprint. The measurement is done a different way to ECG which is the gold standard.So look instead at how many beats you get in each 5 second chunk. You're pretty regular at 1 beat per second. There is only one 5s chunk where the beats are not as evenly spaced out.
If in doubt have a bit of a break so your fingers are fresh, then do it again.
I have been using Fibricheck for many years and they can be really scary looking.I get much worse.Analysis says regular.
It just shows a couple of ectopics or maybe just different beats which we all get.The thing to remember also that actually using it is quite hard to keep the amount of pressure from your finger even.
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