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andyp
Tried again this weekend with a new heart rate strap. Guess I'll be calling the Doc later on today.
Constant effort, heart rate steadily rising and then it felt like a lurch in my chest and the reading instantly went from 175 to 220. I stopped and sat up and tried feeling my pulse manually. I have no real idea of the speed, but I'd guess more like 170, but missing every third beat.