A single radiofrequency procedure cannot usually be done for both atrial fibrillation and ventricular tachycardia because the ablation targets for the two are different. This is determined by the patient’s condition. Radiofrequency refers to catheter-based radiofrequency ablation, an interventional procedure for the treatment of cardiac arrhythmias. The procedure involves delivering an ablation catheter to the target site via the femoral artery or femoral vein, and discharging the ablation catheter depending on the location of the ablation and the type of arrhythmia. Indications for ablation include frequent episodes of atrial fibrillation, idiopathic ventricular tachycardia, and ventricular tachycardia combined with organic heart disease that is poorly treated with medication, and other arrhythmias. The target site for ablation of atrial fibrillation is usually located at the junction of the left atrium and the pulmonary veins, which is measured by cardiac electrophysiology. The ablation target for ventricular tachycardia varies greatly depending on the individual, and may be located in the interventricular septum, tricuspid semicircle, or myocardial scar, etc. Ventricular tachycardia needs to be induced and labeled by cardiac electrophysiological examination before ablation. Atrial fibrillation and ventricular tachycardia cannot usually be done at the same time because of the different ablation targets. When arrhythmia occurs, it is important to consult a doctor and choose the appropriate treatment after examination and evaluation to avoid delay.