If sinus bradycardia has no symptoms, it is recommended not to take drugs. If the resting heart rate is lower than 40 beats/min, β -receptor drugs such as isoproterenol, atropine and ephedrine should be considered. Electrocardiogram shows bradycardia with cardiac arrest. It is suggested to install a pacemaker to prevent chest tightness and syncope.
In addition, the medication should be decided according to the clinical diagnosis results. It can be taken in the early stage of non-myocardial infarction, and intravenous atropine and intravenous isoproterenol are needed in acute myocardial infarction.