Every hospital, surgeon, and cath lab will be a little different. All will say about the same thing when describing their procedure. My team told me almost nothing about how the procedure would go in the cath lab. I had a right heart cath years ago and figured it would be about the same. Was I ever wrong. Total difference. Best thing I can say is try to talk to someone from the cath lab if you can. Ask exactly what their procedure is so you can mentally prepare for it. I have two conditions that affected my experience in the lab. First, I have what is called GYMNOPHOBIA (fear of being seen naked in front of strangers) and second one is called MERTINTHOPHOBIA (fear of being tied down). During my procedure I was stripped of my gown for over 30 minutes and was also tied down. I had no clue they were going to do this until t happened. That has caused me a lot of mental stress. Even now, a year later, I still have issues about that.
So, try to talk to your medical team and the cath lab about any issues you may have.
My Watchman procedure went good and I have had no issues with the device itself. No problems getting off the blood thinners either.