A pacemaker is a stimulator capable of generating periodic electrical impulses, which are passed through electrode wires placed in the heart chambers, stimulating the heart to cause its excitement and contraction, thus enabling the heart to restore its normal beating function and obtain effective blood flow. Under local anesthesia, the electrode wire is placed into the appropriate part of the heart through the subclavian vein, the subclavian skin is cut parallel to the skin for 3-5 centimeters, a small subcutaneous bag is made, the pacemaker is connected to the electrode wire and placed in the bag, and the bag and the cut skin are closed, and the operation is finished. The operation usually takes about 1 hour. Sick sinus node syndrome is a disease of sinus node pacing and conduction dysfunction. Patients suffering from this disease can die at any time due to cardiac arrest caused by failure of sinus node pacing and conduction disorders, etc. Installation of a pacemaker is currently the only effective treatment for sick sinus node syndrome. This treatment is also suitable for patients with second-degree type II and third-degree atrioventricular block, bundle branch block, hypertrophic obstructive cardiomyopathy, heart failure, carotid sinus hypersensitivity, vasovagal syncope, tachycardia, and other diseases. Therefore, patients with symptoms such as palpitations, shortness of breath, fatigue, dizziness, blackout, suffocation awakening during sleep, syncope, etc., and patients with slow pulse, below 50 beats/min, or alternating fast and slow pulse or longer leakage of pulse, should go to the hospital as soon as possible to confirm the diagnosis and timely treatment.