I also spent most of my sleep time in sleep stages 1 and 2, whith REM episodes scattered randomly. I had no time in stage 3, and when I had REM
sleep it was from wake to REM
with no progression through the other cycles. I had two episodes of central sleep apnea, and my sats dropped to 83%, but otherwide my HR was 35-75, with avaerage O2 sats of 97% and above. While I'm awake, my HR stays in the 90's, but can go as high as 140 with exertion, but echo and 72hr holter were normal.