Hi -- can I ask a silly question? I had 4 cardiac arrests in the ER (Canada) in June, and they put in a pacemaker and defibrillator. I was told by everybody that there was no way to tell when we were in AFIB, that we wouldn't be able to feel it. Just how do you guys know when you're in AFIB? I have an oximeter, and my heart rate is always bopping around, never stays steady for more than a few seconds at a time. My last arrhythmia appointment told me that my pacemaker was working 28% of the time, helping my poor little heart keep up with demand. Does that mean I am in AFIB 28% of the time? I feel pretty much the same all the time, never fainty or breathless. thanks.