The ambulatory ECG does not have strict requirements for the maximum heart rate, but mainly depends on the ECG curve depicted. Patients should be careful to avoid strenuous exercise and keep track of activity and symptoms during ECG monitoring. The 24-hour ambulatory electrocardiogram is used to monitor the electrocardiogram changes of the patient’s heart in active and quiet states. When the patient undergoes 24-hour ambulatory electrocardiogram monitoring, there is no strict requirement on the maximum heart rate, and the curve depicted on the electrocardiogram is mainly used as the basis for diagnosis. Patients should try to maintain a calm state during 24-hour ambulatory electrocardiogram monitoring, and should not engage in strenuous exercise to prevent interference with the monitoring results. If the patient performs strenuous exercise, it should be recorded in time. In addition, patients should record their movement status in real time, such as sleeping, exercising, etc., and if discomfort symptoms occur, they should also be recorded at any time. There is no requirement for the maximum heart rate of 24-hour ambulatory electrocardiogram, and patients should consult a doctor in time and follow the doctor’s instructions if they have any uncomfortable symptoms during the 24-hour ambulatory electrocardiogram monitoring.