An ambulatory electrocardiogram recording is an adjunct to a 24-hour electrocardiogram, distinguishing it from a regular electrocardiogram, which can only record what is happening to the heart at that time. An ambulatory electrocardiogram is capable of recording continuous electrical changes over a 24-hour period, whether at rest or during exercise, day or night, and can accurately record continuous electrical changes of the heart. The ECG can detect various types of arrhythmias, including pre-systole, conduction block, atrial fibrillation, tachycardia, bradycardia, etc., from which it can determine the nature as well as the number of arrhythmias in order to clarify the treatment plan. Dynamic electrocardiogram can also detect the dynamic changes in the patient’s ST segment to determine the degree of myocardial ischemia, wearing dynamic electrocardiogram equipment, need to pay attention to try to stay away from electronic products, such as cell phones, computers, etc., to avoid the formation of interference affecting the accuracy of the results, but also pay attention to wear the process of maintaining normal activities, do not intentionally rest or exercise, in order to respond to the true state of the disease.