Radiofrequency ablation of tachyarrhythmias is performed using different methods of calibration depending on the disease base of the arrhythmia. The most common method used today is the conventional intracardiac contact catheter. This method is suitable for relatively simple arrhythmias, while more recent three-dimensional techniques are more suitable for organic heart disease or more complex arrhythmias. Currently, the CARTO system and ENSITE are the main 3D imaging technologies, both of which combine electrophysiological parameters, catheter positioning and navigation with anatomical information to provide a 3D reconstruction of the heart chambers under test, allowing for not only electroanatomical but also electrical excitation, electrical conduction, and voltage maps, as appropriate. In addition, the Ensite 3000 can be used to analyze only one cardiac cycle of tachycardia, which is unique for special cases where the attack cannot be sustained or where the attack is accompanied by hemodynamic instability. These new techniques provide information about the position of the catheter in three dimensions without X-ray fluoroscopy, which makes it easier to mark and better guide ablation. Compared to conventional techniques, these advanced techniques can provide more electrical information at a wider range of sites, which greatly improves the quality of the markings and the success rate of ablation of complex arrhythmias. At present, the Department of Cardiology of our hospital, in addition to the conventional catheter-based labeling techniques for the treatment of common supraventricular tachycardias (such as pre-excitation syndrome, atrioventricular node double pathway, atrial tachycardia, atrial flutter, etc.) and idiopathic ventricular tachycardias (such as outflow tract ventricular tachycardia, left ventricular idiopathic ventricular tachycardia, etc.), has also applied the 3D labeling system for the treatment of complex arrhythmias, such as atrial fibrillation, combined organic heart disease or rapid arrhythmias after cardiac surgery in China. The system has been used to treat complex arrhythmias, such as atrial fibrillation, organic heart disease, or rapid arrhythmias after cardiac surgery. We have eradicated the pain and suffering of many patients with atrial fibrillation, organic heart disease or post-operative cardiac surgery tachyarrhythmias, with the highest success rate in China.