What is a pacemaker? A pacemaker is an artificial “command” that replaces the heart’s pacing point and makes the heart beat in a rhythmic manner. How many ways does it work? How is the pacemaker implantation performed? What complications can occur after pacemaker implantation? Pacemakers are now on-demand pacemakers with sensory functions, which are activated only when the heart is slow and the pacemaker is needed, but not when it is not needed. 2. Physiologically, the heart rate required by each person is different, and the heart rate required during exercise time and at rest is also different, so the pacemaker’s heart rate can be changed, and can be changed as needed. The pacemaker protects the patient’s heart function, minimizes ventricular pacing and encourages its own downward transmission. In addition, the pacemaker can change an asynchronous heartbeat into a synchronous one, and the pacemaker can treat not only bradycardia but also heart failure. The pacemaker itself also has the function of preventing the occurrence of atrial fibrillation.5 The pacemaker has a diagnostic function, and the information is stored in the pacemaker after an arrhythmia has occurred. The pacemaker implantation procedure is described. Under local anesthesia, the surgeon makes a 4-6 cm surgical incision in the patient’s upper chest and places a small pocket in which the pacemaker’s pulse generator is placed. The pacemaker is connected to a metal lead and the surgeon selects a vein in advance, usually the subclavian vein, and feeds the metal lead into the patient’s heart. In this way, the pacemaker stimulates the heart with a certain form of artificial pulsed current, which causes the heart to contract effectively and continuously pump blood to supply the body’s needs, thereby increasing the heart rate and pulse and relieving or eliminating the patient’s symptoms. Complications after pacemaker implantation 1. Damage to the punctured blood vessels, such as local hematoma of the puncture, damage to the organs at the puncture site, pneumothorax or hemothorax, etc. 2. Serious complications include cardiac perforation, although the percentage is very low. 3, infection: including the recent Cain and long-term infection, which is troublesome to deal with, so prevention is very important.