在心室射频切除过程中电极热概况:电极组织接口的新型指示,以告知能量输送
Daisuke Togashi1, Yumi Katsume1, Salah H Alahwany1
1Cardiovascular Division, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA.
JACC. Clinical electrophysiology
|October 24, 2025
概括
在射频 (RF) 剥离过程中,电极的热形状为电极与组织接触提供了洞察力,并补充了阻抗和力向量数据. 这些配置文件可以帮助优化病变大小并防止蒸汽爆发.
科学领域:
- 电力生理学 电力生理学
- 医疗器械 医疗器械
- 生物医学工程 生物医学工程
背景情况:
- 电极与组织的接触和方向是射频 (RF) 剥离的关键因素,影响加热,病变大小和蒸汽爆发的发生.
- 评估这些电极-组织相互作用是具有挑战性的.
- 一个装有6个远端电极温度传感器的导管可以提供热谱来澄清这些相互作用.
研究的目的:
- 为了研究在心室射频切除过程中热形状,导管方向,阻抗变化和蒸汽爆发之间的关系.
- 分析与这些因素相关的不一致的温度阻抗变化.
主要方法:
- 分析了来自100名患者的2,085个RF应用程序.
- 功率定位至最大温度<50°C,阻抗降低>10 Ω.
- 稳定的热形状 (嵌入式,中心,外围) 和导管方向 (垂直,斜,平行) 与力向量的分类.
主要成果:
- 在60.9%的稳定应用中,热谱与力向量对齐.
- 边缘配置文件通常是斜/平行 (72.1%),而中央配置文件通常是垂直 (80.4%).
- 在42.7%的部位,阻抗下降与温度不一致;这些不一致的部位显示出基于温度阻抗不一致的导管方向和热谱的差异 (P < 0.001).
- 与垂直/斜方向相关的嵌入式热谱显示出最大的阻抗下降和最高的蒸汽爆发率 (8.6%对1.3%;P < 0.001).
- 阻抗下降<14 Ω,最大温度<45.8 °C,或温度阻抗读数不一致时没有发生蒸汽爆发.
结论:
- 电极热形状提供了超越力向量和阻抗的宝贵信息,反映了电极与组织的相互作用.
- 这些配置文件与电阻下降和射频剥离过程中的温度差异有关.
- 热形状可能有助于优化射频剥离病变大小并防止蒸汽爆发.
关键词:
剥离 剥离 剥离 剥离导管导管的方向 导管导管的方向一半正常的盐水.内心心电回声心脏成像 (Intracardiac Echocardiography) 是一种内心心电回声心脏成像.蒸汽波普的蒸汽波普是什么热量概况 热量概况 热量概况腹腔心律不整 腹腔心律不整更多相关视频
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