When someone has an ECG during physical examination, it indicates “T-wave change” or “ST-T change”, some doctors will say “myocardial ischemia” and need treatment, and then say a lot of “scary” words. Some doctors will say “myocardial ischemia” and need treatment, and then say a lot of “scary” words, making it very nervous. In fact, there is no need to worry too much. There are many factors affecting the “T-wave change” or “ST-T change” in ECG. In addition to common coronary heart disease, it can also be seen in healthy people, nervousness, lack of sleep, menopausal women, electrolyte disorders, hyperventilation, phytoconstituent disorders and medications. Therefore, the diagnosis of “myocardial ischemia” should not be made at the first sight of “T-wave change” or “ST-T change”. If necessary, further tests such as ambulatory electrocardiogram, exercise panel test, cardiac ultrasound, coronary CTA, etc. should be performed. Only through the above 3 aspects can the specific cause of “T wave change” or “ST-T change” be diagnosed. However, if the diagnosis of “coronary heart disease” is really clear, standardized treatment is needed, including the following aspects: 1. Healthy lifestyle, such as low salt diet, avoid greasy food intake, balanced nutrition, coarse and fine food mix, avoid full meals, quit smoking and alcohol, reduce stress, control weight within the normal range, etc. 2. 3. necessary medication such as aspirin, lipid-regulating drugs, etc. It is recommended to consult with cardiovascular medicine department in regular hospitals to get standardized treatment.