An angiogram (also known as an angiography or arteriography) is a medical imaging technique to detect an enlargement, narrowing or blockages in the blood vessels. The technique is used for the heart (coronary angiography), the brain (Neuro-vascular angiography) or the legs (peripheral angiography) One of most common angiograms performed is to visualize the blood in the coronary arteries looking for occultions, weakness in the vessel wall or narrowing of the blood vessel.