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心室流出道及邻近结构室性心律失常优先与多通道传导的类型

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摘要 心室流出道(VOT)及邻近结构室性心律失常(VA)优先与多通道传导较少见,本文报道3例不同类型的VOT及邻近结构VA的优先与多通道传导,结果显示VOT及邻近结构VA的优先与多通道传导可分为3种类型,其心电图及电生理特征不同:(1)优先传导现象最常见:初始心电图表现为经优先通路突破特征(通常为右心室流出道突破),此类患者只有在优先传导通路的突破口经消融被阻断或受到干扰后,才会表现为经起源点突破或优先传导通路与起源点同时突破产生的不同程度的室性融合波群,并最终经起源点消融成功。(2)优先与多通道传导共存:与优先传导类似,其优先传导突破口常在RVOT,但与优先传导不同的是,其起源点常在肺动脉窦上而不是主动脉窦,只有在RVOT优先传导通路突破口被阻断后,才能显现第二条或多条传导通路突破的心电图特征。(3)多通道传导现象:初始心电图即表现为LVOT及RVOT交替突破或多种LVOT突破形态,在上述部位最早激动点单点消融即可终止多种形态VA。
出处 《心电与循环》 2020年第2期194-201,206,I0006,F0003,共11页 Journal of Electrocardiology and Circulation
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