Effects of Slow Pathway Ablation on Fast Pathway Function in Patients With Atrioventricular Nodal Reentrant Tachycardia

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  • Park Kyoung-Min
    Sanggye Paik Hospital, Department of Internal Medicine, University of Inje College of Medicine
  • Rhee Kyoung-Suk
    Chonbuk National University Hospital, Division of Cardiology, Department of Internal Medicine, Chonbuk National University
  • Jin Eun-Sun
    East-West Neo Medical Center, Department of Internal Medicine, College of Medicine, KyungHee University
  • Nam Gi-Byoung
    Asan Medical Center, Department of Internal Medicine, University of Ulsan College of Medicine
  • Choi Kee-Joon
    Asan Medical Center, Department of Internal Medicine, University of Ulsan College of Medicine
  • Kim You-Ho
    Asan Medical Center, Department of Internal Medicine, University of Ulsan College of Medicine

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  • – Cryo- vs. Radiofrequency Ablation –

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Background: In typical atrioventricular nodal reentrant tachycardia, radiofrequency (RF) ablation of the slow pathway (SP) is known to change the effective refractory period of the fast pathway (ERPFP) after successful RF ablation of the SP. The purpose of this study was to ascertain the mechanism of the ERPFP changes after SP ablation by comparing the results of both cryo- and RF ablation. Methods and Results: A total of 112 patients were enrolled prospectively and their electrophysiological properties analyzed before and after successful SP ablation. Patients were grouped into cryoablation (n=54) and RF ablation (n=58) groups and each group was subdivided into complete ablation (CG) and modification (MG) based on the presence of the SP after successful ablation. CG was performed in 64 patients: 30 by cryoablation and 34 by RF ablation. In patients who underwent complete SP ablation, the ERPFP was shortened significantly after cryoablation (375±74 vs. 281±39ms, P<0.01), without significant change in the atrio-His (AH) or sinus cycle length (SCL) interval. Similarly, the ERPFP was shortened significantly (358±106 vs. 289±84ms, P=0.01) also after RF ablation without change in AH or SCL interval. Conclusions: ERPFP shortening was observed after complete SP ablation with both cryo- and RF ablation without significant changes in indices of autonomic activity. (Circ J 2012; 76: 1091-1096)<br>

収録刊行物

  • Circulation Journal

    Circulation Journal 76 (5), 1091-1096, 2012

    一般社団法人 日本循環器学会

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