Dronedarone reduces episodes of atrial fibrillation, but is generally not curative. Atrial fibrillation is one of the most common arrhythmias and can be categorized into paroxysmal atrial fibrillation, persistent atrial fibrillation, permanent atrial fibrillation and other clinical types according to the frequency and duration of attacks. Dronedarone is dronedarone hydrochloride, a kind of anti-arrhythmic drug, which can be used for paroxysmal or persistent atrial fibrillation. Through the use of this drug, the occurrence of atrial fibrillation can be reduced, and the risk of hospitalization due to atrial fibrillation can be reduced, but it can’t be cured of atrial fibrillation in general. The drug should be used under the supervision of a physician, during the use of the drug may occur heart failure, liver damage, vasculitis, and other adverse reactions, is contraindicated in people who are allergic to the component, permanent atrial fibrillation, severe liver damage, pregnancy. Atrial fibrillation without active treatment can cause thromboembolism, syncope, heart failure and other complications, therefore, the emergence of atrial fibrillation should be timely diagnosis and treatment.