Hello, cardiac radiofrequency ablation is an interventional technique that sends an electrode catheter into a specific part of the heart cavity through veins or arterial vessels, and releases radiofrequency current to cause local endocardial and subendocardial myocardial coagulation and necrosis, thus blocking abnormal conduction bundles and the origin of tachyarrhythmia. The damage range of RF current introduced into the heart cavity through the catheter is 1-3 mm, which will not cause harm to the body. Radiofrequency ablation has become the most effective method for radical treatment of paroxysmal tachycardia. The basic equipment includes X-ray machine, radiofrequency ablation instrument and intracardiac electrophysiological examination instrument. Patients are generally awake during the whole process, and sometimes doctors will use sedatives to relieve patients' nervousness, and patients will be monitored throughout the process; Electrophysiological examination generally does not cause pain, and patients will not feel when the catheter passes through blood vessels and heart cavities. During the examination, the doctor may stimulate the heart with a weak current. Patients will not feel these electrical impulses and often induce tachycardia. He will feel the same as before (maybe dizziness, dizziness, palpitation, chest pain or shortness of breath, etc.). ), so just notify the doctor.