You are not allowed to play with your cell phone while having an ambulatory electrocardiogram, but it is not an absolute no-no. It is just recommended that you can answer the phone normally, but do not use it too often. Try your best not to play with the cell phone, because the cell phone may interfere with the electrocardiogram graph, which will affect the doctor’s objective judgment of this kind of electrocardiogram. In addition to not playing with the cell phone, it is also recommended that the patient should maintain a normal state of life, for example, do not always lie down or sit down because of this examination, you can move appropriately, especially there are patients who are prone to precordial discomfort symptoms after exercise or activity. You can climb the stairs appropriately, induced by the onset of discomfort symptoms, there is no ECG changes, relatively speaking, this will be more helpful to do judgment on the condition.