Coronary artery disease blood vessels appear 50%-60% blockage, there may be precordial pain, exertion chest tightness and dizziness and other uncomfortable symptoms. 1. Anterior heart pain: coronary heart disease patients if the blood vessel blockage reaches 50%-60%, may lead to insufficient blood supply to the heart muscle, then the patient will have anterior heart pain symptoms, generally to the chest dull pain, stabbing pain and other situations. 2. Labor chest tightness: after 50%-60% of the blood vessels of patients with coronary heart disease are blocked, the blood vessels will be relatively narrowed when they exert themselves or engage in physical activities, so the patients will have typical labor chest tightness, and they need to rest in time or take nitroglycerin to relieve. 3. Dizziness: Cardiac stenosis will not only lead to blood supply obstacles in the heart, but also affect the blood supply to the brain, and some patients with coronary artery disease will often be accompanied by dizziness. Coronary artery disease blood vessels appear 50% -60% blockage, may produce these uncomfortable symptoms, the need for timely cardiac angiography and other related tests to clarify the diagnosis, can be under the guidance of the doctor for local stenting to expand blood vessels. Normally, we should also pay attention to avoid overwork and low-salt and low-fat diet, in order to have a better prognosis. If there is any discomfort, consult a doctor in time and follow the doctor’s instructions.