Whether myocardial ischemia is serious or not depends on the specific analysis of the patient’s clinical situation.1. It is not serious, mainly seen in young women, who usually have bad habits of staying up late and anxiety, and the examination of ECG suggests myocardial ischemia. But the patient does not have obvious clinical symptoms, check the cardiac ultrasound and troponin is also normal, and some patients check the cardiac CTA is also normal. This condition is generally not serious to the human body and does not require special treatment. 2. The condition is more serious, especially seen in patients with previous hypertension, diabetes, hyperlipidemia, and symptoms such as chest pain and chest tightness appear when they are active or emotionally excited. At this time, the examination of ECG indicates severe ischemia, and the ECG returns to normal when the symptoms disappear, this situation suggests a more serious condition. It is better to do further coronary angiography and decide the corresponding treatment according to the angiography results.