Atrial fibrillation, referred to as “atrial fibrillation”, is a very common arrhythmia, second only to premature beats, and is a common and complex rapid arrhythmia in middle-aged and elderly people. Atrial fibrillation is a very common arrhythmia, second only to premature beats, which is a common and complex cause of tachyarrhythmia in middle-aged and elderly people. It refers to irregular impulses of 350-600 times per minute in the atria, and the atrial muscle fibers in the atria fibrillate in an uncoordinated manner, thus losing the effective contraction. Atrial fibrillation is not an independent disease. Atrial fibrillation is not an independent disease, it can be complicated by many other heart diseases, such as rheumatic heart valve disease, coronary heart disease, hypertension, cardiomyopathy, constrictive pericarditis, etc. It can be said that atrial fibrillation can occur in all heart diseases. Non-cardiac causes such as chronic obstructive pulmonary disease, pneumonia, pulmonary embolism, thyroid disease, electrolyte disorders, diabetes mellitus, alcoholism, and vagal nerve stimulation (after diet or exercise), can also occur in atrial fibrillation. Atrial fibrillation can be divided by time into acute atrial fibrillation and chronic atrial fibrillation, and chronic atrial fibrillation can be divided into paroxysmal, persistent, and permanent atrial fibrillation. Atrial fibrillation can be paroxysmal, that is, it can terminate on its own. If the attack cannot terminate on its own but can be terminated with treatment, it is persistent atrial fibrillation, and if it cannot be terminated even after treatment, it is permanent atrial fibrillation. Some patients with prolonged paroxysmal or persistent atrial fibrillation, with no evidence of organic heart disease, are called idiopathic atrial fibrillation. Patients with atrial fibrillation often have aura (prodromal symptoms), such as palpitations, feel the pulse has a “steal stop”, “lack of pulse” phenomenon, this should be timely medical care can be prevented before it happens. If there is no other heart disease and the heartbeat is basically normal when atrial fibrillation is present, the patient can be trusted to meet without any praise, and any supervision is a symptom. If atrial fibrillation causes rapid heartbeat, the patient will have panic, shortness of breath, chest tightness, breath-holding, panic, etc. If there is other heart level disease, it will aggravate the inflammatory symptoms of direct heart heart disease, especially heart failure in one year. Atrial fibrillation is prone to wall thrombosis due to atrial non-contractility and hemodynamic disturbances, leading to embolism of the body and pulmonary circulation, common cerebral embolism (stroke, hemiplegia), arterial embolism of the limbs (serious cases even require amputation ), etc. The goals of atrial fibrillation treatment are to convert atrial fibrillation to sinus rhythm and prevent recurrence; to control the ventricular rate below 100 beats per minute; and to prevent thromboembolic complications. If the ventricular rate is not fast and there is no heart failure, and the symptoms are not obvious, no special treatment is needed, only treatment for the cause. In paroxysmal atrial fibrillation with fast ventricular rate and obvious symptoms, or induced pulmonary edema, or heart failure, anti-heart failure and anti-arrhythmic therapy can be used. Those with sustained atrial fibrillation with indications for resuscitation can be treated with: 1) pharmacological resuscitation, mainly with quinidine; 2) synchronized direct current resuscitation; 3) radiofrequency ablation catheterization. The latter is the only method that can effectively cure chronic atrial fibrillation. Patients with atrial fibrillation often need antithrombotic and anticoagulant therapy, the main drugs are warfarin and aspirin, which should be taken under the guidance of a doctor. Patients with atrial fibrillation should avoid strenuous exercise, especially in older patients who should avoid any form of physically demanding activity, and should be careful not to live on higher floors in their daily lives. Data show that patients with atrial fibrillation are thirty times more likely to suffer sudden death and unsuspected cardiac arrest while going upstairs than the general population.