Sinus bradycardia 50 times is not too serious; sports workers, strong physical laborers generally in the quiet or sleep, can produce physiological sinus bradycardia, the heart rate of about 50 times / min; asymptomatic sinus bradycardia does not require special treatment. The heart rate is lower than 60 times / min into sinus bradycardia, sinus bradycardia can be divided into physiological and pathological sinus bradycardia. 1. Physiological sinus bradycardia usually occurs in sports workers and strong physical laborers when they are quiet or sleep, the heart rate can be around 50 beats / minute, asymptomatic sinus bradycardia usually do not need treatment. 2. Pathological sinus bradycardia is generally due to some kind of disease such as elevated intracranial pressure, hypothyroidism and so on to make the vagus nerve tone is too high, slowing down the heart rate. Sinus bradycardia 50 beats per minute is not too serious, the patient does not have obvious discomfort symptoms, do not need special treatment; if there are obvious discomfort symptoms such as shortness of breath, fatigue, fatigue, dizziness, blackouts, chest tightness, etc., we should go to the hospital in time for the relevant examination, and actively carry out the treatment such as implantation of pacemakers. Patients should consult the doctor immediately if they feel unwell. Improve the relevant examination and carry out standardized treatment.