mesocosm - thanks for your reply. Your original post was a long time ago so I didn't know if you'd see mine.
I really think that my sleep apnea has a lot to do with my a-fib. The morning I woke up in a-fib this time, I'd had a bad night on CPAP because I was getting a cold and my nose was stuffed up and I remember waking up coughing a couple of times so I think that may have triggered this episode, not being able to breathe right. I hadn't had one in 6 mos, since my new sleep study and my pressure got lowered from 13 to 8. I did the new sleep study because I was having more episodes of a-fib and I thought that maybe the pressure was too high for me (I had lost about 25 pounds). And I think that was what was happening. And now this is interesting, I went back into normal rhythm today, on my own, after 12 days. Last night I taped my mouth shut with surgical paper tape because my chin strap wasn't keeping my mouth shut and I think I was having leaks. So I got a great night on CPAP and went out of a-fib. Hmmmm...
I had my first episode of a-fib in Dec 2005, right after I had a hysterctomy and the nurses all asked me if I had sleep apnea because my oxygen was always low when I was sleeping. That prompted me to have a sleep study done. I had no more episodes in 2006 but then last year I got 3 in a row - April and 2 in Sept, which prompted me to have another sleep study. Then nothing for 6 mos till now. I've always been converted with meds after about 3 days. This was the first time I was left to go on my own. Thank goodness I don't have to have cardioversion now! That was really stressing me out.
I think it's a tricky thing, finding the right mask, pressure etc. I'm going to check into the hybrid. I just ordered the Mirage Swift II so I'm going to try that one. I've been using the Fisher-Paykel nasal mask and it's actually been working well - as long as I can keep my mouth shut!