Coronary angiography is a common and effective method for diagnosing coronary artery disease, or coronary heart disease, and is a relatively safe and reliable invasive diagnosis. It is a safe and reliable invasive diagnosis and is considered the gold standard for diagnosing coronary artery disease. It is also one of the more common tests in cardiology because it can be used to treat problems that arise in addition to diagnosis. Coronary angiography is performed by percutaneous puncture of a specially shaped cardiac catheter to the root of the ascending aorta and injection of contrast medium to visualize the coronary arteries, which can clearly show the entire left or right coronary artery trunk and its branch vessels to diagnose the condition.