A heart rate of about 50 beats/minute means bradycardia, which can be categorized into physiological and pathological bradycardia. Generally speaking, the heart rate of normal people is between 60 and 100 beats/minute, and below 60 beats/minute belongs to bradycardia. Therefore, the heart rate of 50 beats/minute belongs to bradycardia, which can be categorized into 2 categories according to the reasons: 1. Physiological bradycardia: for example, some people who often exercise and heavy laborers may have a heart rate of 50 beats/minute when they are resting quietly, which is a normal physiological phenomenon. It is also normal for ordinary people to have a heart rate of 50 beats per minute when they are asleep. This kind of bradycardia is not accompanied by other symptoms of dizziness and panic, and there is no other abnormality found by ECG and cardiac ultrasound, so it can be left alone. 2. Pathological bradycardia: Generally speaking, severe hypoxia, hypothermia, hypothyroidism, obstructive jaundice and sick sinus node syndrome, acute inferior wall myocardial infarction and other diseases can also lead to bradycardia, which needs to be treated for the primary disease. This heart rate of 50 beats/minute can be accompanied by dizziness, panic, and even syncope. If the examination found that the heart rate of 50 beats / minute, it is recommended to consult a doctor in a timely manner, further examination, to clarify the cause of the disease, and then follow the doctor’s instructions for treatment.