Q: What is radiofrequency ablation? A: Cardiac radiofrequency ablation is an interventional technique to block the abnormal conduction bundle and origin of rapid arrhythmias by delivering an electrode catheter through a vein or arterial vessel into a specific part of the cardiac cavity and releasing radiofrequency current to cause local endocardial and subendocardial myocardial coagulative necrosis. Q: What diseases require radiofrequency ablation? A: If you have symptoms such as heart panic, you should go to the hospital in a timely manner to clarify the following diseases that need radiofrequency ablation as soon as possible. A. Atrioventricular foldback tachycardia (pre-excitation syndrome): there is a congenital “bypass” between atria and ventricles, the catheter radiofrequency will “cut off” the bypass, the tachycardia or pre-excitation wave will no longer exist. Second, atrioventricular node foldback tachycardia: Atrioventricular node forms a “double pathway”, current in the appropriate conditions, in the foldback loop formed by the two pathways running fast, causing tachycardia; catheter radiofrequency ablation of the slow pathway, only retain the fast pathway, the tachycardia no longer has the conditions. Third, atrial flutter (atrial flutter): atrial flutter is the existence of a large loop in the atria, the current in the loop non-stop circle, atrial beating 250-350 times / min, ventricular generally at 150 times / min; catheter radiofrequency can destroy the loop, resulting in two-way current block, thereby eradicating atrial flutter. Atrial tachycardia (atrial tachycardia): atrial tachycardia is a localized “excitation point” in the left atrium or right atrium with abnormal rapid current distribution or small folding motion in the atrium; electrophysiological examination can detect the ectopic “excitation point” or folding loop, and ablation can be performed to obtain The ectopic “excitation point” or foldback loop is detected by electrophysiological examination and ablation is performed to obtain a cure. V. Ventricular premature contraction (premature beat): mainly used for monogenic frequent ventricular premature with obvious clinical symptoms; often caused by ventricular “foci of excitation”; ablation of ectopic foci of excitation is detected, and ventricular premature can disappear. Ventricular tachycardia (ventricular tachycardia): including idiopathic, bundle branch folding and scarring ventricular tachycardia. Atrial fibrillation (AF): Atrial fibrillation is the most common persistent arrhythmia. It is found that AF is triggered by the rapid electrical impulses issued by the “myocardial sleeve” on the large vein connected to the atria. The use of catheter electrodes to ablate the circumferential pulmonary veins, creating an “electrical isolation” between the large veins and the atria, or the addition of some linear ablation within the atria, can be used to achieve radical treatment of atrial fibrillation. Q: What are the preoperative considerations for radiofrequency ablation? A: First, electrophysiological examination and radiofrequency ablation generally require hospitalization and routine laboratory tests (including electrocardiogram and blood tests, etc.). Second, tell the doctor the name and dosage of the drugs used, and stop all anti-arrhythmic drugs 3-5 days before electrophysiological examination and radiofrequency ablation, anti-arrhythmic drugs may affect the examination results. Third, tell the doctor about allergies to drugs. Q: Radiofrequency ablation operation procedure? A: The electrophysiological examination and radiofrequency ablation are performed in a specially equipped procedure room (called a catheterization room). The catheterization room staff usually includes an electrophysiologist, assistant, nurse and technician. The patient lies on an X-ray bed and the medical staff will connect various monitoring devices to the patient’s body and cover your body with a sterile sheet while the medical staff puts on sterile gowns and gloves. The skin of the catheter insertion site (groin, arm, shoulder or neck) is first disinfected and local anesthesia is administered with local anesthetic; then the venous/arterial vessels are punctured with a puncture needle and the electrophysiology catheter is inserted into the heart chambers through the vessels; the electrode catheter used for cardiac electrophysiology is a long and bendable catheter that transmits electrical signals into and out of the heart. The electrode catheter records the electrical activity in different parts of the heart and delivers weak electrical stimulation to stimulate the heart in order to induce arrhythmias and clarify the diagnosis of tachycardia; the doctor then uses the catheter to find the exact site of abnormal electrical activity in the heart (a process called “tagging”) and then sends radiofrequency current through the ablation device to ablate the treatment, thereby curing Tachycardia. Q: What is the success rate of radiofrequency ablation? A: The success rate of radiofrequency ablation for atrioventricular nodal tachycardia, pre-excitation syndrome and other arrhythmias can reach more than 98%, while the success rate of atrial tachycardia, atrial flutter, ventricular premature, idiopathic ventricular tachycardia and other complex arrhythmias can reach more than 90%, and the success rate of atrial fibrillation ablation can reach 90% for paroxysmal atrial fibrillation and 80% for persistent and chronic atrial fibrillation. Q: What are the complications of radiofrequency ablation? Radiofrequency ablation is generally safe and complications are rare. Vascular puncture complications include local bleeding, hematoma, infection, pneumothorax, thrombosis, embolism, etc. Catheter operation complications include aortic regurgitation, myocardial perforation, pericardial tamponade, etc. Discharge ablation complications include atrioventricular block, myocardial infarction, etc. Q: What should I do after radiofrequency ablation? After radiofrequency ablation, patients must be bed rest according to medical advice. 6 hours of bed rest is required after venous puncture and 8 hours of sandbag compression if there is an arterial puncture, and the affected limb should be braked (restricted immobility) and observed for bleeding; an easily digestible diet should be given during the bed rest period; heart rate and rhythm should be closely observed early after radiofrequency ablation, and any discomfort should be reported to the doctor in time, and electrocardiogram, cardiac ultrasound and chest X-ray should be checked if necessary. If postoperative tachycardia is felt again, but not really attacked, no need to be nervous do not need special treatment; normal activities can be resumed after 1 week after surgery in general; if there is a recurrence after discharge, the ECG should be recorded nearby in time, and contact with the surgeon to decide the next treatment plan. Anti-need antiplatelet therapy is required after radiofrequency ablation, which generally takes 1 month, depending on the patient’s heart rhythm, age and general condition.