Arrhythmia is one of the common heart diseases, which refers to abnormalities in the frequency, rhythm, site of origin, conduction velocity and sequence of excitation of heart impulses. In general, there are three major types of arrhythmias: rapid arrhythmias, including pre-excitation syndrome, supraventricular tachycardia, atrial tachycardia, atrial flutter, atrial fibrillation, ventricular tachycardia and ventricular fibrillation; slow arrhythmias, including sick sinus node syndrome and atrioventricular block; in addition, atrial premature beats and ventricular premature beats are also among the more common arrhythmias. 1, the cause of arrhythmia 1, the heart itself: this is the most important and common cause. Such as rheumatic heart disease, coronary heart disease, hypertensive heart disease, congenital heart disease, myocarditis, cardiomyopathy, etc.. These arrhythmias can easily cause adverse consequences and need early medical attention; 2, systemic factors: various infections, poisoning, electrolyte disorders (such as hyperkalemia, hypokalemia), acid-base toxicity, metabolic disorders (such as hyperthyroidism causing atrial fibrillation) and some drugs; 3, other: fatigue, drinking strong tea, alcohol stimulation, emotional excitement, etc. can often cause arrhythmias, but their symptoms are generally mild and do not cause serious consequences The symptoms are generally mild and do not cause serious consequences. The clinical manifestations of arrhythmia include panic, precordial discomfort, stuffiness, shortness of breath, sweating, black haze or syncope in severe cases, and sudden death in a few cases. The treatment of arrhythmia can be pharmacological and non-pharmacological 1. Traditional drugs (such as cardioplegia, slow heart rhythm, cortolone, sotalol, etc.) are effective in relieving symptoms, but they need to be taken for a long time, and some patients may experience toxic side effects and even cause new arrhythmias; 2. Non-pharmacological treatment of arrhythmia Radiofrequency ablation is a safe, efficient and minimally invasive procedure, which only requires Radiofrequency ablation is a safe, efficient and minimally invasive procedure, which only needs to distribute radiofrequency energy through the catheter to “destroy” the arrhythmia lesion and eliminate the arrhythmia, thus eliminating the inconvenience and pain of long-term medication for patients. It has the characteristics of high cure rate, small trauma and fast recovery. For example, the success rate of ablation for supraventricular tachycardia is over 95%, and the success rate of ablation for typical atrial flutter, some premature ventricular beats and atrial tachycardia is over 90%. For atrial fibrillation, which is the most difficult bastion of cardiac arrhythmias, radiofrequency ablation has made a major breakthrough in recent years due to the application of three-dimensional calibration system. The implantation of cardioverter-defibrillators (ICDs) can identify and terminate malignant tachyarrhythmias such as ventricular tachycardia and ventricular fibrillation in a timely manner, turning patients’ lives around and improving their survival rates. In addition, some specific types of pacemakers can also treat other diseases of the heart, such as cardiac resynchronization therapy, where the implantation of biventricular or triple-chamber pacemakers restores synchronous contraction of the right and left ventricles, which is very effective in treating chronic congestive heart failure, improving the patient’s cardiac function and increasing the patient’s survival rate; the implantation and effective program control of dual-chamber pacemakers can reduce the left ventricular outflow tract pressure in hypertrophic obstructive cardiomyopathy, relieving symptoms such as syncope. The implantation and effective program control of dual-chamber pacemakers can reduce the left ventricular outflow tract pressure in hypertrophic obstructive cardiomyopathy and relieve patients’ syncope and other symptoms.