Sinus bradycardia 53 beats per minute is not serious when there are no obvious symptoms, but to have other diseases that cause slow heart rate need to treat the original disease. Sinus bradycardia is a heart rate of less than 60 beats per minute. Sinus bradycardia can also be seen in normal young people, athletes, and sleepers, and in most of these cases a heart rate of 53 beats per minute and no other symptoms are apparent. Sinus bradycardia can also be caused by other diseases such as cardiac traditional system diseases, intracranial diseases, severe hypoxia, hypothyroidism, etc. These diseases lead to a slow heart rate and should be treated for the primary cause. Sinus bradycardia does not require special treatment when there are no obvious symptoms, but is treated when it leads to a decrease in cardiac output. Sinus bradycardia should be treated under the supervision of a physician.