Question: what is the difference between a heart catheterization and an angiogram?
Answer: Coronary angiography: A catheter is used to inject a radiopaque contrast agent into the blood vessels that feed the heart (coronary arteries) so that they can be seen on x-rays. Ventriculography: A catheter is used to inject a radiopaque contrast agent into one or more heart chambers so that they can be seen on x-rays.