If the pain is related to exercise, anger, etc., the pain is located in the precordial region and lasts for a few minutes and can be relieved after resting, and if the symptoms are recurrent, angina is highly suspected. Some patients may feel heart pain with palpitations when they have arrhythmia or arrhythmia, so they need to have dynamic ECG examination to clarify the type of arrhythmia so that the next treatment plan can be made.