Atrial fibrillation and atrial fibrillation are the same disease, which some people are used to call atrial fibrillation and the standardized textbooks call atrial fibrillation. Atrial fibrillation is due to organic lesions, coronary artery disease, hypertension, cardiomyopathy can cause structural changes in the heart and atria, causing disorderly electrical activity in the atria, resulting in atrial fibrillation. When AF is encountered, it must be actively treated. Transient AF <48h must be converted to AF, and persistent AF must be controlled by ventricular rate and anticoagulation. Now there are new techniques, namely radiofrequency ablation to correct atrial fibrillation, or to do left-ear occlusion to reduce the sequelae of thrombosis and the sequelae in terms of limb embolism. Atrial fibrillation has a high rate of disability and death, so it must be actively treated.