The standard heart rate of normal people is 60-100 beats per minute, if the heart rate is 99 beats per minute, although within the standard range, it means that it belongs to the situation of fast heart rate, which is caused by physiological factors as well as certain pathological factors. For physiological factors, if the patient is over-excited or over-scared, the sympathetic nerves will be over-excited and the heart rate will be fast. In addition, if the patient drinks a lot of alcohol, coffee, strong tea, or has poor rest or sleep, a rapid heart rate may also occur. The above does not mean that there is any obvious disease of the heart, but for patients with organic lesions of the heart, the heart rate of about 99 beats per minute may also occur, such as when the patient has arrhythmia of coronary heart disease, myocarditis, or when the patient has a fever, the above clinical symptoms may also occur.