Arrhythmias are treated primarily for the cause and type of arrhythmia, using drugs such as beta-blockers and sodium channel blockers, e.g., metoprolol tartrate, amiodarone. 1. Etiology: If the arrhythmia has a clear etiology, such as hypertension, hyperthyroidism, etc., it should be treated according to the etiology. If hypertension is accompanied by arrhythmia, the use of beta-blockers, as prescribed by the doctor, can improve cardiac function and antiarrhythmic effect. Medications include metoprolol, propranolol, and others. Hyperthyroidism can lead to heart enlargement as well as accelerated heart rate, thus causing arrhythmia, to give beta-blockers, prolong the potentiation of the time course of drugs, such as propranolol, metoprolol and so on. 2. Types of arrhythmia: Common types include sinus tachycardia, supraventricular tachycardia, ventricular tachycardia, sick sinus node syndrome, high degree of atrioventricular block and so on. Sinus tachycardia is prescribed with metoprolol tartrate, propranolol, etc.; supraventricular tachycardia is prescribed with medications such as propranolol, propafenone, etc.; ventricular tachycardia can be treated with lidocaine, etc., and those with hemodynamic changes should be treated with electrical defibrillation. Sick sinus node syndrome and high degree of atrioventricular block require pacing therapy in severe cases. Side effects can occur with long-term application of such drugs, which can be discontinued on medical advice after the condition is under control. Patients should choose the appropriate medication according to their own situation and under the guidance of the doctor.