The presence of ST-T abnormalities is not the same as having heart disease. Although ST-T abnormalities are common in heart disease, there are many causes of ST-T abnormalities, including heart disease, long-term hypertension, myocardial disease, other systemic diseases, and abnormal autonomic regulation, as follows: 1. Heart disease: can cause ST-T abnormalities, such as myocardial ischemia in coronary artery disease, or the occurrence of acute 2. Long-term hypertension: causes hypertensive heart disease and may also cause ST-T abnormalities. 3. Myocardial diseases: can be seen in dilated cardiomyopathy, hypertrophic cardiomyopathy, myocarditis, etc. 4. Other systemic diseases: can also cause ST-T abnormalities, such as hypokalemia, anemia, hyperthyroidism, etc. 5. Autonomic regulation abnormalities: may also occur. abnormal ST-T changes. Therefore, if abnormal ST-T changes occur, patients need to further identify the specific causes and actively treat the related diseases.