The question of whether chronic myocardial ischemia is serious cannot be generalized, but requires differential diagnosis of the primary cause of chronic myocardial ischemia, which usually has many primary causes, and the cause should be identified and systematically treated according to the cause. If chronic myocardial ischemia is caused by, for example, cardiac vegetative nerve dysfunction, this is not a serious condition and myocardial ischemia can be treated by improving vegetative nerve function. In addition, if chronic myocardial ischemia is secondary to endocrine metabolic diseases, such as thyroid dysfunction, chronic myocardial ischemia can be completely treated by controlling the thyroid function. However, if the chronic myocardial ischemia is caused by cardiogenic diseases, such as coronary atherosclerotic heart disease that leads to chronic cardiac insufficiency, it is a relatively serious case.