24-hour heart rate monitoring is also called Holter in the clinic, the price of this test is about 300 yuan, because the relative price may vary from hospital to hospital. This test is actually very convenient and can be done in the clinic with a small box, about the size of a cell phone, which can be carried on the body and can be moved around without affecting the patient’s daily life. It is best to maintain a normal lifestyle so that the recorded heart rate is the most accurate. It can objectively reflect the average heart rate of the patient during the day, and can record whether the patient has insufficient blood supply to the heart muscle or arrhythmia during the onset of discomfort. However, when doing this test, it is recommended that patients do not undergo cardiac color or CT or MRI tests to avoid interference with the ECG waveform, which may affect the accuracy of the test.