It is possible to have an abnormal ECG st-t and a normal cardiac ultrasound result, and there is no absolute correlation between the two. ECG abnormalities are mainly caused by abnormalities in the electrical activity of the heart, which may be caused by physiological factors such as emotion and exercise, or by pathological factors such as heart disease and hyperthyroidism. Cardiac ultrasound mainly examines the structure and systolic-diastolic function of the heart, which is a commonly used imaging test in clinical practice, but it cannot clarify whether the blood vessels of the heart are narrowed or occluded. ECG st-t abnormalities indicate abnormalities in ventricular repolarization, and possible causes include myocardial ischemia, unstable angina, and myocardial hypertrophy. It can be seen that its presence is not necessarily accompanied by structural changes in the heart, and may be accompanied only by narrowing of the heart vessels. If the ECG or cardiac ultrasound indicates an abnormality, please consult a doctor to avoid delay.