Tachycardia may be tachycardia or atrial fibrillation, if this situation occurs, please consult a doctor for reasonable and standardized diagnosis and treatment. 1. Tachycardia is a condition in which the heart beats too fast, mainly manifesting as panic attacks. If this occurs, you can use some medications to lower the heart rate, such as metoprolol, etc. Such medications need to be used under the guidance of a professional doctor. 2. Atrial fibrillation is characterized by heartbeat, both paroxysmal and persistent, and can be treated with drugs to control the ventricular rate (propranolol, etc.). At the same time, atrial fibrillation is prone to thrombosis and requires anticoagulant medications (e.g., warfarin, etc.); and if the medications are ineffective, atrial fibrillation can be treated with ablation. All of the above medications and treatments need to be done under the guidance of a professional doctor.