What is it?
Angiography is essentially X-ray pictures of the coronary arteries taken as part of a cardiac catheterization procedure. A small catheter is threaded through an artery, usually in the leg, to the coronary arteries. A dye is injected that allows the arteries to be seen on X-ray. A film is obtained during the injection of dye for analysis of the coronary artery anatomy and may reveal the presence of blockages if any.