An angiography is a test that allows your doctor to look inside your arteries to see if there is any blockage and, if so, how much. For this procedure, a thin flexible tube is passed through an artery at the top of the leg (groin) or in the arm to reach the arteries that may be blocked. A dye that can be seen with x-ray is injected into the arteries. Your doctor can then see the flow of blood through your arteries.
One type of angiography is cardiac catheterization, also known as coronary angiography or coronary arteriography.