The electrocardiogram (ECG) is a visualization of the electrical activity of the myocardium and is commonly used in the diagnosis of cardiac arrhythmias and, in some cases, myocardial ischemia. In myocardial ischemia and myocardial injury, the electrocardiogram may show T-wave and ST-segment changes, and even long-lasting T-wave inversion after myocardial injury. Cardiac stenting is a means of revascularization after coronary artery occlusion. Myocardial ischemia and reperfusion arrhythmias may occur on the electrocardiogram after coronary stenting within a short period of time after myocardial damage, but these changes are not specific to coronary stenting and represent changes in the blood supply to the myocardium. Therefore, the electrocardiogram does not reflect whether a coronary stent has been implanted or not. After coronary stent implantation, if you have any discomfort, please consult the hospital in time to avoid delaying your condition.