I have been taking care of myself. That's what makes this all so confusing. Thinking about it, this is the 2nd trip to the ER with a stay over. Both times I was at work when it occurred. The receiving area is not air conditioned and it gets darn hot back there. Air circulation is minimal. It's non-existent in 4 of the bays. Management has refused to provide fans. Based on my medical release report it appears that the root cause for my episodes is environmental. I'm going to file a grievance and see if I can force some improvements back there. My immediate management has tried to help but any improvements have been blocked by Corporate. Or so I've been told.
Side note: I was off for 4 weeks for the heart surgery. I provided doctors note before requesting the time off and another doctor note upon return to work. Corporate then stepped in. First by denying short-term disability pay, which I NEVER requested, then then they changed my approved time-off to "unexcused" absences. That resulted in demerits to the point that I went from a top rating of 4 to low 2 which is a disciplinary level. Unbelievable!