I haven't, but it's pretty straight forward. Show up in the morning. They either go in through your wrist or groin, give you some medical grade margarita through your IV to relax you. If they see anything, they may pop in a stent right then and there, otherwise they'll hold off and schedule a follow up perhaps in a few years. Then they watch you for a couple hours after to make sure there's no bleeding.
We've got a cardiologist or two that come onto the board every so often.