ECG stands for electrocardiogram, which is an abbreviation for electrocardiogram examination. As a basic examination, ECG has become a necessary item in routine checkups. Before the ECG examination, it is important not to perform strenuous exercise, but to calm down for 10 minutes before lying down for the examination. And to maintain emotional stability, do not exist excessive anxiety, tension. During the examination, it is important to fully expose the chest, wrists and ankles, lie flat on the bed, and do not wear chemical fiber clothes to prevent static electricity interference. Electrocardiogram can effectively clarify the presence of cardiac arrhythmias, myocardial ischemia, myocardial infarction and other cardiac abnormalities. If sinus tachycardia is present, it is necessary to clarify whether there is excessive stress and anxiety.