...They basically enter into the arteries on the left and right sides, down by your
manly bits. They send wires / cameras, etc up into the heart and put a device in there to block the hole I had between the two sides of the heart. I was awake for it all... and it didn't exactly tickle.... but nowhere near as bad as the pain from kidney stones and the stint / wire I had coming out of my
manly bits back then.