The number of normal heartbeats in a minute is about 50~150, and the specific number of normal heartbeats in a minute can be categorized into infants and children, adults, the elderly and so on. Infants and young children’s heartbeat will be faster, may be in the 100~120 beats / minute, and even will reach 120~150 beats / minute. In adults, the normal range is 60-100 beats per minute. In older people, the heartbeat is somewhat slower, between 50 and 60 beats per minute. The heartbeat is the number of times the heart beats. If the heartbeat is above the normal range, it is considered tachycardia. If the heartbeat is below the normal range, it is considered bradycardia. There are many causes of tachycardia or bradycardia, and the specific treatment will vary depending on the cause. It is necessary to go to the hospital for a relevant examination to clarify the specific cause of the disease, and then to treat the cause of the disease.