In a quiet state, the normal heart rate is usually between 60 and 100 beats per minute. Adults have a normal calm heart rate of 60 to 100 beats per minute, with slight variations in different populations, but too much deviation from this range can be considered an abnormal heart rate, which can indicate a possible cardiac or other causes of heart rate abnormalities. Clinically, patients with fast or slow heart rate are commonly seen in sinus tachycardia, sinus bradycardia, atrial pre-systole, heart failure, myocardial infarction and other diseases. It is usually necessary to conduct ECG and other auxiliary tests under the guidance of a specialized doctor to make a clear diagnosis. When the heart rate is abnormal and there are uncomfortable symptoms, it is necessary to consult a doctor in time. To summarize, the normal heart rate is 60~100 beats per minute, if there is any abnormality, it is recommended to consult a doctor for examination in time.