I've recently purchased a Fitbit to monitor my general health trends (how much exercise, sleep etc.) and I was wondering if anyone else has used one to monitor episodes of PAF. I was hoping to use the heart rate function to spot when I am going into AF, particularly at night. The thing is, I don't know how the Fitbit responds, does it track a massive increase in heart rate, or does it simply stop recording? The heart rate monitor has stopped recording for about an hour for the last two nights and I can't work out whether this is AF or something else. Is anyone else using a Fitbit with a heart rate function with their AF? How does it respond to AF?