The normal range of heart rate in adults is 60-100 beats per minute and is defined as sinus rhythm. The normal heart rate range for older adults is not additionally defined and fits into the 60-100 beats per minute range as well. Anything above 100 beats per minute is called sinus tachycardia. Sinus tachycardia can be caused by many things, such as anger, exertion, and coffee. If your heart rate is normally within the normal range but has recently accelerated, or has accelerated in the last 1-2 years, you should consider pathological causes, such as hyperthyroidism, which can manifest as a fast heartbeat, accompanied by panic, easy irritability, and irritability. In elderly people with poor cardiac function, an accelerated heartbeat should be considered as an overload of the heart, or an aggravation of heart failure, accompanied by edema and swelling of the lower limbs. A heartbeat below 60 beats per minute is called sinus bradycardia, which is common in people who have regular, long-term, regular physical exercise. A small number of people have a very slow heartbeat, 30-40 beats per minute, i.e. sinus bradycardia, or even irregular heart rate, to be considered a pathological condition, and it is recommended to go to the hospital for further examination.