I never thought of any correlation, but it's certainly understandable. It may explain my insomnia thought to be associated with depression.

Best to sleeo on right if side sleeper and head elevated

I had some sleep issues before my bypass surgery. Now, I wake up after 4 hours.. I was put on ambien and I woke up after 4 hours. I was switched to Xanax , still wake up after 4 hours. I read an article about being on the heart lung machine affects our circadian rhythms …
I hope to get off all these stupid pills soon.

Yes, I do most nights but part of my problem is sleep Apnea. And usually up by 4-4:30 am.

I have difficulty getting to sleep often & occasionally have insomnia. I've been told it's because with heart disease being tired/exhausted is 24/7 but it's not the right kind of tiredness from doing daily activities that helps you fall asleep. I try not to doze during the day & am presently trying to get on a schedule for bedtime & waking in morning