概括
电极与His束之间的距离在开放心脏手术期间显著影响His束电图 (HBE) 幅度. 精确的HBE振幅测量有助于估计他的束.
科学领域:
- 心血管电生理学 心血管电生理学
- 手术导航 手术导航
- 生物医学工程 生物医学工程
背景情况:
- 准确地定位他的捆对于心脏手术至关重要.
- 了解电极距离与His bundle electrogram (HBE) 振幅之间的关系对于精确的信号记录至关重要.
- 目前用于 His 捆绑局部化的方法在开放心脏手术环境中可能存在局限性.
研究的目的:
- 为了研究电极对His束距离对在开放心脏手术期间记录的His束电图 (HBE) 的振幅的影响.
- 要确定HBE振幅是否可以用于估计His捆的解剖位置.
- 评估内心电图的临床实用性,使用距离近的双极电极来定位心脏导电组织.
主要方法:
- 在开放式心脏手术期间使用了一种定制的探头,其中六对距离紧密的电极 (1毫米) 放置在右心房内心脏上.
- 将电极对与His捆的轨道平行放置,以记录HBE.
- 在不同距离 (0毫米,1毫米,2毫米,3毫米) 的测量HBE振幅从His捆.
主要成果:
- 随着距离的增加,最大HBE振幅显著下降:57%在1mm,73%在2mm和82%在3mm.
- 在最近的距离,HBE振幅在0.76-2.44mV之间,在更远的距离上大幅下降.
- 在11名患者中,9名患者的最大HBE超过1.0mV;这一值仅在2名患者达到1毫米,而在2毫米没有患者达到,这表明信号衰减取决于距离.
结论:
- 在开放心脏手术期间,HBE振幅是估计His捆的解剖位置的可靠指标.
- 用近距离的双极电极记录的心内电图为识别心脏的特殊导电系统提供了临床上有价值的精度.
- 该研究证实,随着距离的推移,信号振幅可预见地减少,支持其在手术指导中的使用.
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