Atrial fibrillation is a common clinical arrhythmia that may lead to cerebral thrombosis and heart failure, and should be seen promptly with or without symptoms to avoid delays in treatment. Atrial fibrillation is a rapid arrhythmia with an abnormal pacing point originating from the atria, which is common in patients with organic heart disease and can also occur in healthy people. First of all, sudden onset of atrial fibrillation can cause palpitations, chest tightness, shortness of breath and other discomforts, and in severe cases, even black haze or syncope, posing a threat to the patient’s quality of life and life safety. Frequent or persistent atrial fibrillation may lead to changes in the structure and function of the heart, which may lead to cardiac insufficiency and other diseases in the long term. In patients with underlying heart disease, atrial fibrillation can also aggravate the deterioration of cardiac function and requires prompt attention and treatment. In addition, atrial fibrillation may cause serious complications such as massive cerebral infarction, which may directly endanger the patient’s life or leave serious complications such as disability, and will be a great burden to the patient and family both mentally and financially. Especially for patients with persistent atrial fibrillation, the possibility of thrombosis is higher, and timely anticoagulation therapy is needed to prevent its occurrence. Atrial fibrillation is a common clinical arrhythmia, and epidemiological surveys suggest that the incidence of atrial fibrillation can reach 0.77% among residents aged 30-85 years in China, and the incidence of atrial fibrillation increases with age, and is particularly common in the elderly. Atrial fibrillation should be taken seriously when it is detected or suspected, and timely medical attention should be sought, and atrial fibrillation without symptoms should not be ignored. Although atrial fibrillation is a very common clinical arrhythmia, its danger should not be underestimated. When atrial fibrillation is detected, regardless of the symptoms, it is important to seek timely medical attention and treatment to avoid more serious consequences due to delayed treatment.