Frequent premature ventricular contractions need to be treated according to the specific cause, for example, potassium supplementation is needed for premature ventricular contractions caused by low potassium, sodium phenytoin is needed for premature ventricular contractions caused by digitalis intoxication, and heart disease-induced premature ventricular contractions need to be treated for the underlying disease. 1. Low potassium: Low potassium will lead to the decrease of resting potential of cardiomyocytes, the increase of excitability of cardiomyocytes, and the weakening of excitability conduction, which will lead to premature ventricular contractions. At the same time, it will be accompanied by generalized fatigue, mental depression, poor appetite and other symptoms, which need oral potassium chloride extended-release tablets or intravenous potassium supplementation for symptomatic treatment. 2. Digitalis toxicity: digitalis can enhance the contractility of the heart muscle, slow down the heart rate, resulting in frequent ventricular premature beats, often accompanied by blurred food, or even yellow vision and other symptoms. The use of digitalis should be stopped immediately, and phenytoin sodium should be injected for symptomatic treatment. 3. Underlying heart disease: coronary heart disease, rheumatic heart disease, valvular disease and other heart diseases can easily cause frequent premature ventricular contractions, which need to be actively treated for the primary underlying diseases, applying secondary prevention of cardiovascular disease drugs such as aspirin and atorvastatin symptomatic treatment. Antiarrhythmic drugs such as metoprolol should also be used. Patients with frequent ventricular premature beats need to pay attention, and it is recommended to consult a doctor in time, under the guidance of the doctor, for the cause of the active treatment.