What Things Consider Before Angiography? The Angiography procedure is the most common treatment for coronary artery disease. It is a minimally invasive imaging technique that allows to visualize arteries in the body and determine whether there are any blockages. A thin tube made of flexible plastic, called catheter, is inserted into an artery close to the heart under local anesthesia. The images captured from there are extremely bright and clear. These images of coronary arteries function as a diagnostic tool, allowing doctors to assess the severity of disease and determine