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射频(RF)导管消融慢径是治疗房室结折返性心动过速(AVNRT)的一线治疗方法.经静脉冷冻导管消融也可用于治疗AVNRT.该研究前瞻性、随机比较经静脉冷冻导管消融与RF导管消融治疗AVNRT的有效性与安全性. 方法除外年龄低于18岁或高于80岁、以往接受AVNRT患者及先天性心脏病患者.入选患者200例经电生理证实AVNRT患者停用抗心律失常药物至少5个半衰期,随机接受冷冻导管消融(100例)或RF导管消融(100例)慢径治疗.7F头端4mm的冷冻导管用于冷冻标测和冷冻消融.冷冻标测在-30℃对消融靶点进行疗效观察,冷冻标测完成后进行冷冻消融至
Radiofrequency (RF) catheter ablation of slow pathway is the first-line treatment for atrioventricular nodal reentrant tachyarrhythmias (AVNRT), and AVNRT can be used to treat AVNRT.This study prospectively and stochastically compared the efficacy and safety of intravenous cryogenic catheter ablation and The effectiveness and safety of RF catheter ablation in the treatment of AVNRT.Except for age less than 18 years old or older than 80 years old, patients with AVNRT and congenital heart disease were previously accepted.All 200 patients were selected for electrophysiological confirmation of AVNRT withdrawal anti-arrhythmia At least 5 half-lives of atypical drugs were randomized to receive a cryo-catheter ablation (100 cases) or RF catheter ablation (100 cases) .7F distal 4-mm cryogenic catheters were used for cryoablation and cryoablation. ℃ on the ablation target efficacy observation, frozen mapping completed after cryoablation to