ST segment changes are ECG findings. either ST segment elevation or downshift is seen in heart disease.
ST segments reflect changes in the potential and timing of early repolarization of the left and right ventricles. ST segment changes include ST segment elevation and ST segment downshift.
ST segment elevation should not be greater than 0.3mV in V1~V3 leads and 0.1mV in all other leads.
The normal ST segment is mostly a line of equal potentials, and sometimes it can be mildly shifted, but the ST segment downshift should not be greater than 0.05 mV in any lead.The ST segment elevation pattern of normal people is slightly concave upward (i.e., bowed back and downward), and is often connected to a higher T-wave in the back of the ST segment.
ST segment downshift beyond the normal range is a sign of myocardial ischemia and myocardial damage. ST segment elevation beyond the normal range with bow-back up is commonly seen in acute myocardial infarction, variant angina pectoris, and ventricular wall tumors; if bow-back down, it is seen in acute pericarditis.
It is recommended to go to the cardiology department of regular hospitals to improve other examinations and clarify the cause of the disease, and receive standardized treatment according to the doctor’s instructions.