What is cardiac catheterization with radiofrequency ablation? What arrhythmias can it be used to treat? Radiofrequency current is one of the many forms of electrical current that can be converted into electrical energy. It is released in a high-frequency low-power bipolar manner, producing an impedance thermal effect in the local tissue of the body, causing the evaporation and drying of water in the tissue cells and forming a small range of limited necrosis without destroying the surrounding normal tissue. Cardiac catheterization radiofrequency ablation is a method to treat intractable arrhythmias by clarifying the mechanism of arrhythmia through cardiac electrophysiological examination, and then placing the catheter electrode at the lesion causing the arrhythmia or the abnormal conduction pathway area in the heart to deliver radiofrequency current to cause myocardial necrosis or injury in the lesion area. Since RF current has high-frequency characteristics, does not stimulate nerve or muscle fibers, has light arrhythmogenic effects, and does not depress cardiac function, it is performed without anesthesia, without pain to the patient, with high safety and few complications. This technology started in China in 1983, and is now more commonly carried out, with a very high success rate, and has reached international leadership in many aspects. Currently, radiofrequency ablation is suitable for the treatment of most supraventricular tachycardias, including atrioventricular nodal tachycardia, overt or occult preexcitation syndrome combined with atrioventricular tachycardia or atrial fibrillation, idiopathic or bundle-branch refractory ventricular tachycardia, partial paroxysmal tachycardia and atrial fibrillation.