Coronary atherosclerosis cannot be diagnosed by self-testing. Coronary atherosclerosis is a thickening of the walls of the coronary arteries, hardening, loss of elasticity, and smaller lumen of the blood vessels. Causes of coronary atherosclerosis include high blood pressure, high blood cholesterol, diabetes, and smoking. Coronary atherosclerosis can have no clinical symptoms, and at this point it is impossible to know by self-testing. When coronary atherosclerosis narrows or blocks the lumen, leading to myocardial ischemia, hypoxia or necrosis, thus causing heart disease, called coronary heart disease. Patients may have exertion, activity after the anterior region of the heart feeling of tightness, pain and discomfort and other clinical symptoms, but coronary heart disease still can not be self-test diagnosis. Coronary atherosclerosis can be diagnosed through electrocardiogram, cardiac ultrasound and coronary angiography and other tests to assist in diagnosis. Coronary angiography is the gold standard for diagnosing coronary atherosclerosis. If you suspect that you may be suffering from coronary atherosclerosis, you should immediately go to a regular hospital for examination, diagnosis and treatment.