Amiodarone is the first choice of antiarrhythmic drug because there are many types of arrhythmias, including atrial fibrillation, atrial flutter, ventricular tachycardia, ventricular fibrillation, ventricular flutter, etc. Some patients with premature beats have recurrent atrial or ventricular premature, and amiodarone is the first choice for heart rate control in either type of arrhythmia. Amiodarone itself is an antiarrhythmic drug with relatively few side effects, but it does have some adverse effects, such as atrioventricular block and prolonged QT interval, and in some patients, bradycardia. In addition to amiodarone, propafenone can also be used, which is a broad-spectrum antiarrhythmic drug with relatively good effects and no major side effects.