Angiography is a medical imaging technique. In this type of imaging process, an X-ray image is obtained after injecting a contrast dye into the bloodstream via arteries. When performed for the heart it is titled as "coronary angiography", which is one among most common type of angiography. It lets the physician see the blood flow in the patient's heart. This test generally aims at finding out blockage in the heart, specifically in the 'coronary artery' that helps to diagnose severe heart conditions