It is possible that an older person who has a slow heart rate may not have any cause, as a person’s heart rate itself slows down gradually with age. If the patient is within the safe range of slow, no special intervention therapy is needed. Generally elderly people do not need special intervention if their heart rate is 50 beats or more in the awake state. However, if a patient suddenly develops a slow heart rate, it is important to further investigate the cause of the slow heart rate, such as whether it is due to hyperkalemia or hypothyroidism. Other patients may have an inferior wall myocardial infarction, and the most common type of arrhythmia in inferior wall myocardial infarction is a high degree of atrioventricular block or sinus bradycardia. It is recommended that cardiac ultrasound, ambulatory electrocardiogram, and serum ions be performed if necessary to help further evaluate the cause of the patient’s slowed heartbeat.