I am your girl again Frank!!!
I had one last month as i was having issues with a high resting heartrate.
They will give you something that makes your heart beat like a freaking racehorse. It didn’t hurt but I sure didn’t like it!!!! Then you get in a machine and they take a bunch of pictures. I was there about 3 hours or more. Afterwards i was jittery for a while. Drink a bunch of water after