For patients with atrial tachycardia, the third class of antiarrhythmic drugs is currently the preferred drug in clinical practice. The representative drug is amiodarone, which can be combined with amiodarone by pushing it and then with amiodarone by drip, which can help to better revert to sinus rhythm. If necessary, it is recommended that patients can also combine oral beta-blockers, such as oral bisoprolol or metoprolol, with further investigation of the cause of atrial tachycardia and treatment of the primary disease in order to better control the heart rate. If hyperthyroidism is considered to be the cause, it is recommended that the patient also take oral methimazole, and if hypokalemia is the cause, oral potassium chloride extended-release tablets, or direct potassium chloride dosing.