Hello, according to your description, under normal circumstances, both myocardial fatigue and myocardial ischemia can lead to abnormal changes in ST-T segment during ECG examination. If it's myocardial fatigue, don't worry too much. This is due to the myocardial injury caused by overwork for a long time under the influence of work pressure, mental tension and other factors. This is mostly the case of myocardial strain in young white-collar workers, which belongs to functional changes. Generally, you can rest and recuperate without treatment. First of all, we should rule out the risk factors of cardiovascular disease, see whether blood pressure, blood lipid and blood sugar are normal, and also see whether there is a history of smoking and a family history of cardiovascular disease. If you have these risk factors, you should have an electrocardiogram under heart load for further investigation. Or do color Doppler echocardiography to see if the heart structure has changed. If there are no abnormalities in these two tests, it can be said that the structure and function of the heart are normal.

I hope my answer is helpful to you, and I wish you health and happiness.