Ischemic heart disease is mainly characterized by coronary artery atherosclerosis, thrombosis, etc. Clinical manifestations of the symptoms of chest tightness, shortness of breath is the most common, which can lead to, for example, angina pectoris, congestive heart failure, arrhythmia, and so on. 1. Etiology: When coronary artery atherosclerosis, thrombosis and other causes, resulting in long-term lumen narrowing of the coronary artery, thus causing a significant reduction in local blood flow, this will cause myocardial ischemia. 2. Clinical manifestations: according to the different clinical manifestations, it can be divided into congestive ischemic cardiomyopathy and restrictive ischemic cardiomyopathy. (1) Congestive ischemic heart disease: such as angina pectoris, congestive heart failure, arrhythmia. Patients with angina pectoris may present only with asymptomatic myocardial ischemia or with symptoms such as chest tightness, fatigue, and dyspnea. Patients with heart failure often present with exertional dyspnea, and severe symptoms such as nocturnal paroxysmal dyspnea and sedentary breathing may occur. Arrhythmias, especially ventricular pre-systole and atrial fibrillation, are common. (2) Restrictive ischemic heart disease: chest tightness and shortness of breath are the most common symptoms. Initially, shortness of breath after labor, and then shortness of breath and fatigue during light activities or rest. Ischemic heart disease life need to pay attention to low-salt diet, avoid too much emotional excitement, can be appropriate exercise. If necessary, go to the hospital cardiovascular specialist for systematic treatment.