Ugly stuff in any event. When they do a angiogram, they give you a huge dose via IV.......my heart doesn't like it and quits every time. Has happened 4 times now.......an interesting experiance only to be done by people you really trust. My doc never changes his tone of voice, calling for digitalis and calmly giving instructions as I sweat harder than I can ever remember........off course, it is all done while you are conscious.......kind of a life affirming experience.