The side effects of having pacemaker surgery include infection, cardiac perforation, and pacemaker-related arrhythmias. 1. Infection: The process of installing a pacemaker requires the insertion of electrodes through blood vessels. The process of invasive operation may lead to infections, mainly bloodstream infections, and the patient may experience fever. 2. Cardiac perforation: the electrodes of the pacemaker need to be implanted into the heart, and the ventricular electrodes need to be fixed into the myocardium, and the process of screwing in the electrodes may lead to perforation of the myocardium, or even acute myocardial infarction, and the patients may have a drop in blood pressure, or even fainting and death. 3. Pacemaker-related arrhythmia: after implantation of pacemaker in some patients, dysfunction of pacemaker may occur, causing pacemaker-related arrhythmia. During the process of pacemaker implantation, it is necessary to do a good job of sterilization, careful preoperative preparation, and postoperative care to prevent the occurrence of various side effects of pacemakers.