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电容大小和通路电阻对植入式除器除门的除值的影响
C D Swerdlow1, R M Kass, P S Chen
1Division of Cardiology, Cedars-Sinai Medical Center, Los Angeles, Calif.
Circulation
|October 1, 1994
概括
植入式除器的较小的60微法拉德 (μF) 电容器更适合高阻路径,而标准的120μF电容器更适合低阻路径. 最佳电容大小取决于除路径阻力.
科学领域:
- 心血管医学 心血管医学
- 生物医学工程 生物医学工程
- 电子生理学 电子生理学
背景情况:
- 植入式除器中截断指数脉冲的时间常数取决于输出电容大小和除路径阻力.
- 针对除的最佳电容大小尚未得到确定的.
研究的目的:
- 为了比较使用标准的120微法拉德 (μF) 和较小的60μF电容器的除门 (DFT),在接受心脏转换器-除器的患者中.
- 为了确定除通路阻力与不同电容大小的有效性之间的关系.
主要方法:
- 一项涉及67名患者的研究比较了120μF和60μF电容器的DFT,使用的是心上或静脉间的电极.
- 用单相和双相截断指数脉冲 (65%倾斜) 进行了DFT的对对比.
- 测量了除通路阻力,并与电容器性能相关联.
主要成果:
- 在路径电阻和60μF与120μF电容器的DFT比率之间发现了显著的反相关性.
- 120μF电容器在低电阻路径 (≤40 Ω) 中优越,特别是在低DFT中.
- 60μF电容在高电阻路径 (>61 Ω) 中表现出更大的优势,特别是在更高的DFT中.
结论:
- 与120μF电容器相比,60μF电容器在低电阻路径中显示出临床上微不足道的较高DFT.
- 60μF电容器在高电阻路径中产生了临床上重要的较低DFT.
- 最佳电容与临床除的路径阻力相反.
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