Bradycardia usually does not require special treatment if it is asymptomatic. If there is insufficient cardiac output, drugs such as atropine or isoprenaline can be applied, but drug treatment for bradycardia is usually indicated for short-term treatment, long-term application is uncertain, and is prone to serious side effects, so symptomatic bradycardia should be considered for cardiac pacing therapy. Common heart diseases that cause bradycardia include sinus arrest, sinus atrial block, sick sinus syndrome, and atrioventricular block. If medication is ineffective, cardiac pacing therapy should be considered, and a permanent pacemaker should be implanted. Bradycardia caused by extracardiac factors can be seen in intracranial disease (increased intracranial pressure), severe hypoxia, hypothermia, hypothyroidism, obstructive jaundice and vasovagal syncope, such bradycardia need to be first diagnosed clearly, treatment of the primary pathology, to remove the causative factors, bradycardia can often be recovered on its own. If bradycardia is detected and accompanied by insufficient cardiac output (darkness before the eyes, transient consciousness disorder or syncope), immediate medical attention should be sought for definitive diagnosis and active treatment.