5 Situations When You'll Need To Know About Angiography Angiography is a medical procedure used to visualize the inside of blood vessels. It can be used to diagnose and treat conditions that affect the arteries, veins, and heart. The procedure involves injecting a contrast material into the bloodstream and then taking X-rays or other imaging tests. Angiography is often used to evaluate chest pain or other symptoms of heart disease. It can also be used to diagnose and treat conditions that affect the arteries, veins, or heart. The procedure is also sometimes used to screen for cancer or other diseases.