A Coronary Angiogram is a procedure where a special X-ray of your heart’s arteries is taken to see if they are narrowed or blocked. A catheter (a long tube) is inserted into an artery in your groin and is moved up inside your artery until it reaches your heart. A special dye is then injected into the tube and X-ray images are taken as the dye is pumped through your heart and coronary arteries (the arteries supplying blood to your heart). These X-rays give clear and accurate information about the state of your heart and coronary arteries.