Got a bit of an uncomfortable mystery I'd like to share. I actually posted this question some time ago, but it's worth a second try. Long time sleep apnea sufferer. My apnea is now corrected to around 0.2 to 0.4 AHI each week, so on that level I'm happy. The mystery, however -- at about 3 hours of sleep (no more than 3.5 or 4), I shoot awake, heart racing, etc. It doesn't feel like a panic attack because I've learned to remain very calm when it happens. The heart racing tends to make me anxious after a while if it continues, but as long as it all calms down fairly quickly, I can usually return back to sleep in 15 or 20 minutes. I don't believe they've ever happened again after that.
It's gotten to where they're so predictable, I usually set an alarm when I go to bed (for about 3 hours), hoping that my sleep will be so broken that it won't happen. Sometimes that work, sometimes not.
I use Sleepyhead, and I check the records but they're usually pretty unimpressive -- maybe a few deep breaths right before i wake up, but I'm not sure that's even unusual. Instead, it's quiet sudden.
It's a long shot, but are there any ideas floating around?
IMHO it is not related to sleep apnea. I'm on CPAP for about 12 years now. Have some minor heart issues since forever. Have bladder capacity of 4 hrs max and usually wake up after 3 hrs of sleep but never with racing heart. In fact, I don't even fully wake up and I'm back fully asleep mere seconds after I'm back in bed.
Everything I post on this board is nothing more than an opinion expressed by an apneak. Normally, it's based on facts and experience but sometimes, I may get things wrong or not have all the facts.
I reserve the right to change my mind. Why? Because tomorrow I may know better.
Might wanna see your PCP about it.
Love your family, treat your friend(s) well, and don't waste your time. Everything else is just so much BS.