I have A-Fib and can’t figure out what triggers it. Sitting down watching television and it comes on. I wake up with it so I doubt it’s caffeine or anxiety. But each a-fib I get sends me to the hospital emergency department. The last time my heart rate kept going up until it finally hit 138 in the hospital and they were talking about rolling me down into the ER.

But it was going down. I had passed out completely and the nurses had to put me in bed and I have no clue as to what happened or how they picked me up to put me back in the bed.

It was like I was in a coma.
One other time I was watching TV and a-fib struct me again.
Off to the ER I went again and after making sure I wasn’t having a heart attack, I told the nurse that I’m prone to having a-fib and she yelled at me saying
“We’ll you don’t have it now!” and left the room with me not being monitored as I usually am due to having a mechanical aortic valve replacement and was on blood thinners as I’m still on for life. She came in about 20 minutes later and handed me my discharge papers without any instructions.
My point is that there is no rhyme or reason like you said.
You never know when it’s going to strike and that’s why my cardiologist told me that I shouldn’t drive anymore due to a few heart diseases.