CAG procedure is coronary angiography, a test used to diagnose the presence of coronary artery disease and is the gold standard for diagnosing coronary artery disease. Currently, coronary artery disease can be diagnosed clinically by non-invasive methods such as exercise panel tests, myocardial nuclei, or coronary enhancement CT, but the most accurate of all tests is coronary angiography, which is more intuitive. When the decision is made to perform the next step of intervention, it can be performed directly. CAG is a well-established procedure that usually involves two accesses and is usually performed by puncturing the right radial artery, delivering the coronary catheter to the opening of the coronary artery in the direction of the vessel and injecting the contrast medium. The CAG procedure has fewer complications and takes less time to perform, and can be completed in less than half an hour by a skilled operator who is simply performing the angiography.