Arrhythmia is a condition in which the heart does not beat in the normal sequence or pathway. It is a concomitant symptom of almost all heart diseases and sometimes exists as an independent disease. The former is mainly due to various myocardial lesions resulting in ectopic foci of excitation, and is classified according to its site into various types of premature beats (atrial premature, ventricular premature, junctional premature), tachycardia (atrial tachycardia, ventricular tachycardia, junctional tachycardia), various types of flutter and fibrillation (atrial flutter, atrial fibrillation, ventricular flutter, ventricular fibrillation), etc. Slow arrhythmias are mainly due to lesions or aging of the cardiac conduction system, including sinus bradycardia, sinus arrest, atrioventricular block at all levels, intraventricular block, etc., and various types of escape beats. Because arrhythmias interfere with the normal rhythm of the heart, they have a certain impact on the physiological function of the heart, but their clinical manifestations are often complex, and their severity depends mainly on the nature and duration of the arrhythmia. In mild arrhythmias, patients may have no conscious symptoms, or they may experience palpitations, chest tightness, shortness of breath, etc. Severe arrhythmias can lead to dizziness, black haze, shock, syncope or even sudden death. Because arrhythmias vary in severity, they are sometimes very dangerous and their occurrence is insidious and sudden, making it difficult to prevent them, which is an important reason why many patients have a fear of heart disease. Therefore, it is clinically important to understand the causes, nature and onset of arrhythmias and to assess their harmfulness. Does it mean that all arrhythmias need to be treated? Of course, it cannot be generalized, but should be analyzed on a case-by-case basis, and should be integrated with the underlying cardiac disease. With a large amount of clinical experience, experts in arrhythmia treatment have reached some consensus, which has led to the following criteria to determine whether each type of arrhythmia should be treated: 1. Whether the arrhythmia seriously interferes with the physiological function of the heart to pump blood, if so, it should be treated. 2. Whether the underlying disease causing the arrhythmia is stable, such as acute infarction with arrhythmia should be in a state of cardiac instability, closely monitored and treated in a timely manner, especially ventricular arrhythmias. 3, whether the patient’s heart function is good, heart failure patients combined with arrhythmias are significantly more dangerous, should try to correct. 4. The duration of arrhythmia, whether it is chronic and recurrent, long-term rapid onset arrhythmia can lead to cardiomyopathy heart enlargement, resulting in adverse consequences, should also be given treatment. The analysis of specific cases is as follows: 1. The very fast frequency of ventricular tachycardia (HR〉200 beats/min) and ventricular flutter and ventricular fibrillation lead to ineffective contraction of the heart, which seriously interferes with the pumping function of the heart and is extremely dangerous, and once it occurs, it often leads to syncope, shock and even sudden death, which is the main cause of sudden cardiac death and is called fatal arrhythmia, and is the arrhythmia that cardiologists focus on preventing and treating. In addition to active pharmacological treatment for people at risk of such arrhythmias, a large number of clinical studies have proven that implantation of an embedded automatic cardioverter-defibrillator (ICD), which can provide 24-hour monitoring of such patients and provide timely diagnosis of malignant arrhythmias and in vivo defibrillation to terminate their attacks, is the most reliable way to prevent sudden death. In addition, radiofrequency treatment of ventricular tachycardia and ventricular fibrillation has made great progress and opened up new treatment methods. 2, long intermittent sinus arrest (〉3 seconds or more) and III0 degree atrioventricular block can make the heart stop, the patient often fainted, mostly in elderly patients, the danger is relatively large, such patients should be treated for specific causes, if various reversible factors are excluded, the patient is difficult to recover, then the pacemaker implantation is the safest and most effective treatment measures. Although atrial fibrillation and atrial flutter are not fatal arrhythmias per se, prolonged control of the heart rhythm by atrial fibrillation and atrial flutter will produce uncoordinated atrial contraction and reduced pumping function of the heart, and patients often have severe palpitations, shortness of breath and other discomforts, the most critical is to cause atrial enlargement and thrombus, which is the main cause of large cerebral infarction, resulting in a high rate of death and disability. These tragic clinical lessons are common. Because of the high prevalence of atrial fibrillation and atrial flutter, especially in the elderly population older than 60 years of age with an incidence of up to 3.5%, the risk is also very high and widespread. Many drugs can treat or prevent atrial fibrillation episodes, but the efficiency is not high, and there are many side effects of long-term use. In recent years, due to in-depth research on the pathogenesis of atrial fibrillation atrial flutter, arrhythmia experts have adopted radiofrequency ablation, which is a minimally invasive interventional treatment method with high success rate and low recurrence rate, bringing good news to the majority of atrial fibrillation atrial flutter patients. 4, paroxysmal supraventricular tachycardia, often due to pre-excitation syndrome, with sudden onset and sudden stop characteristics, when the attack rhythm reaches 160-250 times / min, often leading to palpitations, shortness of breath discomfort, such as a long time not terminated will lead to shock and other serious consequences. Although drugs can restore the rhythm but can not prevent its attack, now the use of electrophysiological examination plus radiofrequency ablation, can achieve the radical effect, has become the preferred treatment method. 5, frequent ventricular premature refers to ventricular premature greater than 5 times per minute, most patients can appear obvious palpitations chest tightness, etc., seriously interfere with the patient’s life, learning and work, when serious ventricular tachycardia, RonT ventricular premature, and even malignant arrhythmia, so there is a certain danger, due to timely treatment. In most cases the effect of drug treatment is still satisfactory, if you can not tolerate drugs or treatment effect is not good, then radiofrequency treatment effect is reliable technology is mature, and even can reach the root of the cure. Which arrhythmias can be left untreated? Of course, most of the arrhythmias occurring in most cases are not serious, some basically do not affect or slightly affect the physiological function of the heart can be negligible, long-term clinical observation of these arrhythmias also generally do not evolve, do not produce serious consequences, this can be long-term follow-up observation, appropriate use of drugs to control symptoms, or do not need to treat. Specifically, some of the following 1, HR less than 60 times / min is sinus slow, can be a pathological condition, but for some athletes or some healthy young people, no symptoms sinus slow, can be a sign of its good heart function, of course, no need The asymptomatic sinus bradycardia in most cases can be observed and followed up. Even if it is ventricular premature, it can be treated without medication. Long-term clinical observation shows that if there are no paired, multi-source, joint rhythm, or tachycardia, the prognosis of these simple premature beats is still good. 3. If atrioventricular block of type I0-II0I (Wen’s phenomenon) occurs in young people, especially at night, sometimes it is a phenomenon of vagal hyperfunction, of course Sometimes it is also a pathological phenomenon, such as after myocarditis, and can be treated symptomatically and observed on follow-up.