The term ambulatory electrocardiogram (Holter) may not be new to you, and many times doctors will prescribe this test. What kind of test is an ECG? What are some of the misconceptions that we have when performing this test? What are the precautions to take when doing an ECG? The primary purpose of an ECG is to monitor various arrhythmias including bradycardia, tachycardia and cardiac arrest, as well as possible undersupply of blood, which does not last the whole day but is episodic. disappears. The continuous and prolonged monitoring of the ECG is a good way to avoid this situation. Myth 1: Rest during the examination, less activity. Many people think that they need to stay quiet and try to rest and reduce their activities when they bring an ECG, but this is not true. When applying the ECG examination, you should rest and rest normally as usual, and carry out the collection of heart rhythm and other information in the real daily life, in order to make a more accurate and objective assessment. Even doctors try to induce discomfort and artificially increase the amount of exercise in order to induce discomfort and get the relevant abnormal ECG data. Myth 2: Hospitalization is required for the test. This examination does not require hospitalization, the examination equipment can be brought home by the patient, after wearing time to return the instrument, the doctor for playback analysis. Myth 3: A normal ECG is not a problem. Many people with definite cardiogenic diseases such as black haze and syncope do not experience episodes of discomfort while wearing an ambulatory ECG, and therefore may not capture abnormalities during the test. Therefore, in the presence of cardiogenic syncope or symptoms of disease highly associated with arrhythmia, repeated ambulatory ECG examinations or long-range ambulatory ECG examinations should be performed to catch as much evidence of arrhythmia as possible. Third, the following matters need to be noted when doing an ambulatory ECG 24-hour ambulatory ECG examination is to bring a small box (that is, an ambulatory ECG machine) on the patient to connect electrode wires and electrode pads. Patients can wear it home, walk, eat, and sleep when they have an ECG. However, they are not allowed to approach strong magnetic fields and electric fields, which can interfere with the ECG recording. Patients are also not allowed to take a shower so as to avoid electrode dislodgement, which may lead to examination failure. Every time the patient has discomfort, the time of the attack should be recorded in time. It is better for the patient not to over-activate the upper body, because too much strong potential generated by muscle activity will interfere with the ECG activity recording, and try not to wear cotton underwear, which will generate electrostatic interference. Finally, we remind you that you can move freely at will when you do an ambulatory ECG, and it will not interfere with your daily life, so you can do what you need to do. You can’t be like some people who are afraid to move around since they brought their recorder home. Otherwise, all the abnormalities that should be there will no longer appear. The purpose of having a checkup is to detect abnormalities. If the appearance of chest tightness, chest pain, etc. is related to activity, you can intentionally go for a moderate amount of activity in order to record the abnormality. Only then do you need someone to accompany you in case of an accident.