射频除 - - 病变的实时可视化及其与基础参数的相关性
Fabian Bahlke1, Andreas Wachter1, Nico Erhard1
1Department of Electrophysiology, German Heart Center Munich, Technical University Munich, Munich, Germany.
Pacing and clinical electrophysiology : PACE
|May 10, 2024
概括
射频 (RF) 除病变的形成是非线性的,在最初的几秒钟内迅速增长. 局部阻抗 (LI) 的变化有效地表明RF剥离过程中病变的发展.
科学领域:
- 心血管干预 心血管干预
- 医疗器械技术 医疗器械技术
- 电力生理学 电力生理学
背景情况:
- 成功的射频 (RF) 切除需要持久的和外壁病变.
- 射频病变的实时可视化对于程序的成功至关重要.
- 了解局部阻抗 (LI) 在病变形成中的作用至关重要.
研究的目的:
- 开发一个实时射频损伤可视化模型.
- 为了研究局部阻抗 (LI) 对射频损伤形成的影响.
- 分析功率和接触力对损伤特征的影响.
主要方法:
- 在ex vivo猪心脏模型中使用了一种力感应,LI感应导管.
- 记录了损伤大小和切除参数 (功率,接触力) 一秒一秒,持续60秒.
- 在不同的功率 (20-50W) 和接触力 (1-25g) 设置下,分析了36个病变的1847个测量结果.
主要成果:
- 损伤形成表现出非线性增长,在最初几秒钟达到峰值 (最大. 1.08毫米/秒的深度,2.71毫米/秒的直径).
- 早期的损伤程度主要取决于功率水平.
- 当地阻抗 (LI) 变化最初最显著 (高达-12 Ω/s),并且随着时间的推移而减少.
结论:
- 灌射频除病变的形成是一个非线性过程.
- 最初的快速病变生长显著影响最终的病变大小.
- 局部阻抗 (LI) 作为监测损伤形成变化的可靠指标.
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