Mild ST-T abnormality may be heart disease, hypokalemia, infectious diseases, etc. 1. Heart disease: For example, coronary heart disease, myocarditis and other diseases, the patient’s heart blood vessels are narrowed and the blood flow is insufficient, resulting in insufficient blood supply to the heart and myocardial ischemia, which leads to the above symptoms. 2. Hypokalemia: When patients are hypokalemia, potassium ions enter into the cells, which will change the electrophysiology of the cells, thus leading to the above symptoms. 3. Infectious factors: For example, when respiratory tract infection occurs, it will cause the patient’s body temperature to rise, and when the rise is relatively obvious, there will also be mild ST-T abnormality. Mild ST-T abnormality indicates that the patient may have a certain degree of functional cardiac changes and other diseases, and it is recommended that the patient go to a regular hospital for timely examination and treatment under the guidance of the physician.