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首页> 外文期刊>Circulation journal >Epicardial ablation with irrigated electrodes-Effect of bipolar vs. unipolar ablation on lesion formation-
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Epicardial ablation with irrigated electrodes-Effect of bipolar vs. unipolar ablation on lesion formation-

机译：具有灌溉电极的心外膜烧蚀 - 对损伤形成的双极与单极消融 -

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摘要

Background: Ablation of ventricular tachycardia originating from the left ventricular (LV) epicardium is often limited by the radiofrequency power delivery. We compared the effect of bipolar vs. unipolar epicardial ablation on lesion size. Methods and Results: Eleven excised pig hearts were superfused with saline (2 L/min). Unipolar ablation (25 or 30 W for 120 s) was performed between the LV epicardial saline-irrigated electrode and an indifferent electrode (n=33 lesions). Bipolar ablation (25 or 30 W for 120 s) was performed between a 4-mm saline-irrigated-tip (20 ml/min) electrode on the LV epicardium and an opposing 10-mm non-irrigated-tip electrode on the LV endocardium (n=38 lesions). Wall thickness did not differ between experiments (15.4±2.4 vs. 15.3±2.1 mm). Impedance was lower at the beginning and end of unipolar ablation than at the beginning and end of bipolar ablation (163.2±20.3Ω and 109.9±16.0Ω vs. 194.6±23.3Ω and 127.1±16.4Ω, respectively) (P<0.001). Epicardial lesion width did not differ between unipolar and bipolar ablation (10.1±2.7 vs. 10.2±2.4 mm), but lesion depth was greater with bipolar ablation (10.6±2.7 vs. 7.5±1.0 mm) (P<0.001). Unipolar ablation produced no transmural lesion, but bipolar ablation produced 15 (46%) (P<0.001). Steam pop occurred in 11 (29%) and 3 (9%) cases, respectively (P=0.036). Conclusions: Bipolar ablation of the LV free wall is highly effective at creating an appropriately deep epicardial lesion.
机译：背景：源自左心室（LV）表皮的心室性心动过缓的消融通常受射频电力输送的限制。我们比较了双极与单极外膜消融对病变大小的影响。方法和结果：11种切除的猪心脏与盐水（2L / min）超稠合。在LV心外膜盐水灌溉电极和无次电极（n = 33病变）之间进行单极消融（25或30W。在LV表皮上的4mm盐水灌溉尖端（20mL / min）电极和LV内切管上的相对的10mm非灌溉尖端电极之间进行双极烧蚀（25或30W）在LV外膜上进行（n = 38个病变）。实验之间的壁厚没有差异（15.4±2.4与15.3±2.1 mm）之间没有差异。在单极消融的开始和结束时阻抗分别比双极消融的开始和结束（163.2±20.3Ω和109.9±16.0Ω，分别分别为194.6±23.3Ω和127.1±16.4Ω）（P <0.001）。外皮病变宽度在单极和双极消融（10.1±2.7与10.2±2.4mm）之间没有差异，但对双极消融的病变深度较大（10.6±2.7与7.5±1.0 mm）（P <0.001）。单极消融生产没有透气病变，但两极消融产生15（46％）（P <0.001）。蒸汽POP分别发生在11（29％）和3（9％）案件中（P = 0.036）。结论：LV自由壁的双极消融在创造适当深的外膜病变方面是高效的。

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  • 来源
    《Circulation journal》 |2012年第2期|共6页
  • 作者

    NagashimaK.; WatanabeI.; OkumuraY.; SonodaK.; KofuneM.; ManoH.; OhkuboK.; NakaiT.; KunimotoS.; KasamakiY.; HirayamaA.;

  • 作者单位

    Division of Cardiology Department of Medicine Nihon University School of Medicine Tokyo Japan;

    Division of Cardiology Department of Medicine Nihon University School of Medicine Tokyo Japan;

    Division of Cardiology Department of Medicine Nihon University School of Medicine Tokyo Japan;

    Division of Cardiology Department of Medicine Nihon University School of Medicine Tokyo Japan;

    Division of Cardiology Department of Medicine Nihon University School of Medicine Tokyo Japan;

    Division of Cardiology Department of Medicine Nihon University School of Medicine Tokyo Japan;

    Division of Cardiology Department of Medicine Nihon University School of Medicine Tokyo Japan;

    Division of Cardiology Department of Medicine Nihon University School of Medicine Tokyo Japan;

    Division of Cardiology Department of Medicine Nihon University School of Medicine Tokyo Japan;

    Division of Cardiology Department of Medicine Nihon University School of Medicine Tokyo Japan;

    Division of Cardiology Department of Medicine Nihon University School of Medicine Tokyo Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 心脏、血管（循环系）疾病;
  • 关键词

    Bipolar radiofrequency ablation; Epicardial myocardium; Irrigated-tip ablation;

    机译：双极射频消融;心外膜心肌;灌溉尖端消融;

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