Comparison of Conventional 4 mm Tip Catheter and Open Irrigated Catheter in Circumferential Pulmonary Vein and Antrum Isolation for Paroxysmal Atrial Fibrillation
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概要
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<B>Background:</B> Open irrigated catheter (OIC) has the advantage of radiofrequency (RF) ablation power delivery without thrombus formation. It had been proposed that OIC are capable of creating larger lesions resulting in greater efficacy. This study compared the efficacy and safety of OIC and conventional 4 mm tip catheter (NIC) retrospectively. <B>Method:</B> One hundred fifty-five patients underwent circumferential pulmonary vein and antrum isolation (CPVAI) using NIC (Group 1, 76 patients; temperature limited 55°C with maximum power 35 W) or OIC (Group 2, 79 patients; temperature cut 42°C and power set 30–40 W with a saline pump flow rate of 30 mL/min) were compared about ablation and procedural parameter and clinical outcome. <B>Results:</B> The procedural parameter (total procedure time, fluoroscopic time, total number of RF energy delivery) to achieve complete CPVAI was not significantly difference between two groups without total RF energy delivery (48635±10123 in Group 1 versus 77812±17505 J in Group 2; P<0.01). Three procedural complications were documented in Group 2 (cardiac tamponade, pericarditis, gastric hypomotility) and none in Group 1. During follow up period, AF free rate was not differed between two groups in short term follow up. <B>Conclusion:</B> CPVAI using OIC had more procedural complications than NIC ablation whether there is no apparent efficacy during ablation procedure and a similar outcome in this study. Farther examination would be necessary how to manage the power and irrigation flow setting while using OIC in CPVAI.
著者
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Iesaka Yoshito
Tsuchiura Kyodo General Hospital
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Komatsu Yuki
Tsuchiura Kyodo Hospital
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Taniguchi Hiroshi
Tsuchiura Kyodo Hospital
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Kusa Shigeki
Tsuchiura Kyodo Hospital
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