Lesion Formation by Ventricular Septal Ablation With Irrigated Electrodes : – Comparison of Bipolar and Sequential Unipolar Ablation –
スポンサーリンク
概要
- 論文の詳細を見る
Background: Ablation of ventricular tachycardia originating from the interventricular septum (IVS) is often limited by the presence of re-entrant pathways deep in the IVS. We compared the efficacy of bipolar ablation vs. sequential unipolar ablation in creating a transmural lesion across the porcine IVS. Methods and Results: Seventeen excised swine hearts were superfused by pulsatile saline flow. Bipolar ablation (at 30W, 50W or 70W for 120s) was performed between 2 saline-irrigated (20ml/min) 4-mm tip electrodes, 1 on the left and 1 on the right side of the IVS. Sequential unipolar ablation (at 30W, 50W or 70W for 120s) was performed on the left and right sides of the IVS with an irrigated-tip catheter. Bipolar ablation produced a narrower, deeper lesion than did unipolar ablation. A transmural lesion was created by sequential unipolar ablation in 7.7%, 8.3% and 0% of tissue preparations and by bipolar ablation in 50.0%, 46.7% and 71.4% of tissue preparations at 30W, 50W and 70W. Conclusions: Bipolar ablation of the IVS was highly effective for creating a transmural IVS lesion. (Circ J 2011; 75: 565-570)
著者
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KASAMAKI Yuji
Division of Cardiovascular Medicine, Department of Medicine, Nihon University School of Medicine
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WATANABE Ichiro
Division of Cardiology, Department of Medicine, Nihon University School of Medicine
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OKUMURA Yasuo
Division of Cardiology, Department of Medicine, Nihon University School of Medicine
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OHKUBO Kimie
Division of Cardiology, Department of Medicine, Nihon University School of Medicine
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KOFUNE Masayoshi
Division of Cardiology, Department of Medicine, Nihon University School of Medicine
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HIRAYAMA Atsushi
Division of Cardiology, Department of Medicine, Nihon University School of Medicine
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Nagashima Koichi
Division of Cardiology, Department of Medicine, Nihon University School of Medicine
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Ohya Toshiyuki
Division of Cardiology, Department of Medicine, Nihon University School of Medicine
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