使用单极心房电压和分离映射识别导电的临界减速
Ziliang Ye1, Nawin L Ramdat Misier1, Mathijs S van Schie1
1Department of Cardiology, Erasmus Medical Center, Rotterdam, the Netherlands.
JACC. Clinical electrophysiology
|July 18, 2024
概括
在心房动 (AF) 中,分断的低电压电位表明局部导电速度明显减慢. 然而,这些信号对于识别缓慢导电区域的灵敏度较低,这使得切除策略复杂化.
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
背景情况:
- 针对持续性心房动 (AF) 的当前废除策略通常针对分成或低压电位.
- 最近的研究质疑这些电位是否准确地代表了由于传导速度减慢而引起的节律失调基质.
研究的目的:
- 调查局部导电速度 (CV) 和分成/低压电位之间的关系.
- 为了识别心房中极度减缓导电的区域.
主要方法:
- 在319名患者中,在鼻节律期间进行手术内心副心脏映射.
- 定义的低压电位 (<1.0 mV) 和分离 (≥3个偏移).
- 使用离散速度向量计算局部CV.
主要成果:
- 分裂的低电压潜力很少见 (0.36%的心房部位).
- 与其他潜在类型相比,在分成的低压位点 (46.0厘米/秒) 的局部CV最低.
- 结合低电压 (<1 mV) 和分成 (≥3 偏移) 值,确定了缓慢导电区域 (CV <50 cm/s),具有中等的积极预测值,但灵敏度低.
结论:
- 具有分成的,低压电位的站点表现出明显较慢的局部CV.
- 低灵敏度和预测值与灵敏度之间的反向关系使得使用这些基于信号的切除方法对AF的使用变得复杂.
- 需要进行进一步的研究,以完善切除目标,以改善AF患者的治疗结果.
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