Comparative Efficiency of a Conventional 8-mm-Tip Triple Sphere Shaped Tip Catheter Versus an Irrigated Tip Catheter during Additional Cavotricuspid Isthmus Ablation after Pulmonary Vein Isolation
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概要
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<B>Background:</B> It is well known that common atrial flutter has been documented after pulmonary vein isolation (PVI) in patients with paroxysmal atrial fibrillation (PAF). However, only one catheter can be used for reasons of insurance in Japan. This study aimed to prospectively compare an irrigated tip catheter to a conventional 8-mm-tip triple sphere shaped tip catheter during additional cavotricuspid isthmus (CTI) ablation after PVI. <B>Methods:</B> The study included 302 consecutive patients with PAF that underwent a PVI procedure with an irrigated tip catheter. After the procedure, 151 patients underwent a CTI ablation with an irrigated tip catheter, and a conventional 8-mm-tip triple sphere shaped tip catheter was used in the remaining 151. Radiofrequency (RF) current was applied until bidirectional isthmus block was achieved. <B>Results:</B> A significantly higher success rate was achieved using only the conventional catheter than with only an irrigated tip catheter (98% vs. 93%; p<0.05). A significant difference was also found in the number of RF applications (14±9 vs. 17±10; p<0.05). There were no significant differences in other parameters between two groups. No major complications occurred. <B>Conclusion:</B> In achieving CTI block after the PVI, RF ablation performed with a conventional 8-mm-tip triple sphere shaped tip catheter was more efficient than that with an irrigated tip catheter.
著者
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Yamauchi Yasuteru
Department Of Cardiology Musashino Red Cross Hospital
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Okada Hiroyuki
Department Of Cardiology Musashino Red Cross Hospital
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Obayashi Tohru
Department Of Cardiology Musashino Red Cross Hospital
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Tao Susumu
Department Of Cardiology Tokyo Medical And Dental University
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Maeda Shingo
Department Of Biochemistry The Cancer Institute Of The Japanese Foundation For Cancer Research
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