Rapid atrial fibrillation is a common clinical arrhythmia. It is usually diagnosed as rapid atrial fibrillation when the ventricular rate exceeds 100 beats per minute or more. Patients may present with symptoms such as panic, chest tightness, dizziness and shortness of breath, and the diagnosis can be confirmed by electrocardiogram examination. Tachyarrhythmic atrial fibrillation occurs overwhelmingly in patients with severe organic heart disease, often leading to the development of angina pectoris and heart failure. For such patients, active control of the ventricular rate is needed to improve clinical symptoms. Commonly used drugs include metoprolol and bisoprolol, but they need to be used properly under the guidance of a doctor.