Mild cardiovascular stenosis (stenosis <50%), the severity of symptoms in patients with coronary artery stenosis varies depending on the degree of stenosis. A common symptom is angina. Some patients may also experience symptoms such as dyspnea. Angina pectoris is the most common clinical symptom, usually after activity, emotional excitement and other triggers, there is a loss of balance between myocardial oxygen consumption and oxygen supply, resulting in pain. The nature of the pain is mostly suffocation or tightness, sometimes radiating along the left shoulder to the left upper limb or to the left scapular region, which can be relieved within a few minutes after resting and taking nitroglycerin. Some patients may experience symptoms such as dyspnea. Nitrate drugs can be taken as prescribed by the doctor, can expand the coronary artery blood vessels to increase myocardial blood supply, to alleviate myocardial ischemia is helpful, commonly used drugs such as nitroglycerin, isosorbide mononitrate, and so on. Patients with coronary artery stenosis should pay attention to maintaining healthy lifestyle habits to prevent the emergence of hypertension, hyperglycemia and hyperlipidemia. The use of β-blockers and other drugs such as metoprolol to slow the heart rate, reduce myocardial oxygen consumption, increase myocardial blood supply. It is recommended that patients go to the hospital for examination and treatment under the guidance of the doctor after clarifying the cause of the disease, and the use of drugs should follow the doctor’s instructions.