功能映射揭示缓慢的导电和基质进展在心房的功能映射
Etel Silva Garcia1, Ivan Lobo-Torres1, Juan Fernández-Armenta1
1Department of Cardiology, Hospital Universitario Puerta del Mar, Cádiz, Spain.
概括
隐藏的缓慢导电 (HSC) 位点,通过外刺激识别,在持续性心房 (AF) 中比 Paroxysmal AF 更为普遍. 这种功能映射揭示了可复制的异常基质,有助于理解AF表型.
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
- 医疗成像医学成像
背景情况:
- 心房动 (AF) 是一种复杂的心律失常,具有不同的表型.
- 识别潜在的电生理基质对于有效治疗至关重要.
- 隐藏的缓慢导电 (HSC) 是一个拟议的基板,但其精确的作用和识别方法需要进一步研究.
研究的目的:
- 分析对短合心房外刺激的反应,以确定隐藏的缓慢导电 (HSC) 区域.
- 调查HSC与心房动 (AF) 现型 (心房动与持续性) 之间的关系.
主要方法:
- 20名患有发作性和持续性AF的患者接受了肺静脉隔离.
- 在鼻节律中输送了三重短联的外刺激,以根据电图片碎片化识别HSC+位点.
- 在AF,SR和节奏节奏期间进行了高密度映射.
- 评估了HSC+和复杂分成型心房电图 (CFAE) 的空间同定位.
主要成果:
- 持久性AF显示HSC+部位的数量和百分比明显高于阳性AF (13.9%对3.3%).
- 在HSC+位点 (53±22毫秒) 和HSC-位点 (13±11毫秒) 中,电图持续时间的三角值显著更长.
- 在AF期间,HSC+站点的数量较少,但比CFAE更容易复制,分布更一致.
结论:
- 使用外刺激的功能映射有效地识别了离散和可重现的异常心房基质.
- 通过这种方法识别的HSC在持续性AF中更频繁,这表明它具有不同的基质.
- 这种方法为表征AF基质和表型提供了有价值的工具.
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