An angiogram is a test to find out which arteries supplying the heart have become narrowed. An angiogram uses X-rays to show ‘route maps’ of blood vessels and arteries in the heart.
On the other hand, angioplasty is a procedure to expand narrow arteries that may follow on from an angiogram.
In which cases is an angiogram done?
What is angiography?
Physics of Diagnostic X-rays