Ejection 26% is lower than the normal value, after the installation of pacemaker can not completely replace the normal heart, but can significantly improve the heart ejection function, improve the ejection fraction. The ejection fraction of a normal heart is between 50% and 70%, and the left ventricle is slightly higher than the right ventricle; if it is less than normal, it suggests cardiac insufficiency. Installing a pacemaker can improve the patient’s ability of cardiac muscle agitation and contraction, thus treating the cardiac dysfunction caused by arrhythmia, and can improve the heart’s ejection capacity to a certain extent and increase the heart’s ejection fraction. Nowadays, the pacemaker technology is very mature, the installation process is relatively safe, the accident rate is small, after the operation, we should pay attention to the standardization of treatment, and regular regular follow-up, the benefits are far more than the disadvantages.