Originally Posted by
PeteHski
If it jumped from 110 to 180 in one second and stayed exactly at 180 for a minute before dropping off, then I wouldn't believe it was real. Especially if you didn't notice anything unusual and wasn't sprinting flat out at the time it happened! Normally it takes some considerable time for your heart rate to ramp up like that.
Disclaimer: I'm an engineer used to analysing performance data, not a medic.
Tachyarrhythmias have instantaneous onset, whereas physiological HR increases in response to effort ramp up over seconds. That said, I'm somewhat skeptical that this represents a real arrhythmia.