Rapid atrial fibrillation is preferred to be treated with electrical cardioversion if hemodynamically unstable, or with medications such as propafenone if hemodynamically stable. 1. Hemodynamic instability: In atrial fibrillation, the frequency of atrial excitation reaches 300-600 beats/minute, and the heart rate is often fast and irregular, sometimes reaching 100-160 beats/minute. For rapid atrial fibrillation, electrical cardioversion is preferred when there is hemodynamic instability. 2. Hemodynamic stability: For hemodynamically stable rapid atrial fibrillation, the first choice of drug therapy, drugs to restore sinus rhythm such as propafenone, flutamide, etc.; drugs to control ventricular rate such as amiodarone, metoprolol, verapamil, etc.; anticoagulant drugs such as warfarin, dabigatran, etc.. When diagnosed with rapid atrial fibrillation, it is recommended to consult a doctor in a timely manner and standardize the treatment under the guidance of a physician, and avoid unauthorized use of drugs to avoid adverse reactions.