Coronary angiography is a procedure that uses a special dye (contrast material) and x-rays to see how blood flows through the arteries in your heart.Before the test starts, you will be given a mild sedative to help you relax.An area of your body, usually the arm or groin, is cleaned and numbed with a local numbing medicine (anesthetic).
The cardiologist passes a thin hollow tube, called a catheter, through an artery and carefully moves it up into the heart. X-ray images help the doctor position the catheter.Once the catheter is in place, dye (contrast material) is injected into the catheter. X-ray images are taken to see how the dye moves through the artery. The dye helps highlight any blockages in blood flow.The procedure may last 30 to 60 minutes.