Propafenone can treat premature beats, but it can’t be said that it can definitely cure premature beats. Propafenone is a class Ic antiarrhythmic drug, which can effectively treat premature beats. Pharmacological studies have shown that propafenone can reduce myocardial systolic depolarization, prolong conduction time, and can improve the threshold potential of cardiomyocytes, significantly reducing the spontaneous excitability of the myocardium. 1. Indications: for premature ventricular contractions, paroxysmal ventricular tachycardia, supraventricular arrhythmias such as atrial premature contractions, paroxysmal supraventricular tachycardia, and preexcitation syndrome with supraventricular tachycardia, atrial flutter or atrial fibrillation, among which the treatment of ventricular premature contractions and paroxysmal ventricular tachycardia is more effective. 2. Contraindication: patients with sinus node dysfunction without pacemaker protection, severe atrioventricular block, double bundle branch block, severe congestive heart failure, cardiogenic shock, severe hypotension and allergy to the drug are contraindicated. 3. Precautions: First find the correctable cause. Premature ventricular contractions that are overloaded should be treated aggressively even if they are asymptomatic. Caution should be exercised in patients with severe myocardial damage, severe bradycardia, hepatic or renal insufficiency, and extremely low blood pressure. Patients with premature beats need to go to the hospital in time when they have obvious symptoms, please use the drug under the guidance of the doctor.