Angiogram. This is often an X-ray in the arteries and veins to search out blockage or narrowing. This process is completed by Placing a thin, flexible tube into an artery inside the leg and injecting a distinction dye. The distinction dye will make the arteries and veins obvious around the X-ray. https://cristianbiotz.wikicommunications.com/5295497/the_definitive_guide_to_gangrene