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在右心房的常见心房电路的三维映射

D C Shah¹, P Jaïs, M Haïssaguerre

¹Service d'Electrophysiologie Cardiaque, Hôpital Cardiologique du Haut-Lévèque, Bordeaux-Pessac, France.

|December 24, 1997

概括

常见的心房电路有所变化,通过腔椎峡有一个一致的路径,但有一个可变的后部阻塞区域. 上腔静脉 (SVC) 融合和隔膜激活模式也显示了个体间的差异.

科学领域:

电子生理学电子生理学
心脏节律失常症心脏节律失常症
心血管研究研究心血管研究

背景情况:

常见心房的精确解剖回路仍未完全通过使用传统的绘图技术来定义.
了解电生理基质对于开发有效的剥离策略至关重要.

研究的目的:

为了勾勒出常见的反时针心房的三维内心激活模式.
为了确定导电阻塞的关键区域,并评估心房电路内的导电速度.

主要方法:

在17名患者中,使用Cordis-Biosense EP导航系统进行了三维右心房内心激活映射.
顺序点采集覆盖了飞周期的很大一部分,评估传导速度和分数潜力.
电心电图 (ECG) 飞波形态与详细的激活图进行了比较.

主要成果:

一个广的,可变的后部区域的分断潜力和导电块被确定为电路的后部极限.
该电路通常涉及一个上升的隔膜波面,前面的上腔静脉 (SVC),下降的侧面右心室,并完成通过腔脉.
与其他电路四肢相比,传导速度在中间地峡中明显较低,后部普遍存在分成的电位.

结论:

在常见心房的右心房电路中存在个体间的变化.
洞穴皮地峡表现出不断的激活,而一个可变的封锁区定义了后边界.
SVC融合和隔膜激活模式表现出不一致性,突出显示了飞电路中的解剖学变异性.

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