Sinus tachycardia is defined as more than 100 beats per minute. Some sinus tachycardia is a normal physiological phenomenon and does not affect life expectancy, while in some pathological sinus tachycardia, the life expectancy of the patient varies depending on the condition. In the case of congenital sinus tachycardia, it has no effect on life expectancy at all and can enjoy the same life expectancy as a normal person. If sinus tachycardia is caused by late nights, poor health, etc., changing habits and improving physical fitness will have no effect on life expectancy. If sinus tachycardia is caused by diseases, such as hyperthyroidism or serious infection, if not treated, it may lead to heart failure and eventually shorten the life span, the specific shortening time is related to the severity of the disease and the patient’s physical condition, and cannot be generalized. In addition, the physical examination of sinus tachycardia, if there is no physical discomfort, indicating that it is a physiological phenomenon, without special intervention, patients do not need to be too nervous.