There are many reasons for high heart rate, such as hyperthyroidism, hypovolemia, cardiac insufficiency, fever, some rapid arrhythmia, and some people have high heart rate under physiological conditions. You can take 1/4 tablets of betaloc orally. If the sustained-release tablet is once a day, if it is short-acting twice a day, pay attention to monitoring blood pressure and heart rate during the taking stage. Because many diseases can cause the heart rate to increase, if you just take medicine for the symptoms, the effect will not be too good, and it may also delay the diagnosis and treatment of other diseases, so I suggest you go to a professional hospital for a physical examination.