While both terms may sound similar, they have a vast difference. Coronary Angiography and Coronary Angioplasty are two varied medical procedures but related commonly to the blood vessels; however, one is a detection procedure while the other is a course of treatment. Coronary Angiography is used to examine the blood vessels to detect a potential heart disease or problem, whereas Coronary Angioplasty is a surgical procedure performed to restore the flow of blood in the heart.