Thankfully I've only attended A&E 3 times over 13 years while in AF. First time, it took from 10pm until 4am before it was stabilised with a blood-pressure of 240/180---off the scale. That time I had to take 10 tablets all at once besides having a heparin injection. It was pretty scary and I remember feeling thoroughly worn out, and kept in for 2 and a bit days but soon recovered, no heart attack or stroke and was told to take it easy------which I have done ever since !
2nd and 3rd times were nowhere near as bad as the first but showed no sign of calming down so 5/6 years ago was the last time and now have very few rapid heartbeats as time has gone on, thank goodness as BP is near normal to low now.
I know that I've had A/F for 29 years, I did tell the doctor that I'd had it since the menopause at 50 which was 16 years when first admitted bringing it to date at 29 years. It's gradually got less and less thankfully.
INR for warfarin testing has been steady so that'll do me.