左捆支部区域步调纠正了由右心室顶部步调引起的功能块线
Kentaro Goto1, Shinsuke Miyazaki1, Miho Negishi1
1Department of Cardiovascular Medicine, Institute of Science Tokyo, Tokyo, Japan.
Pacing and clinical electrophysiology : PACE
|May 6, 2025
概括
左捆支部区域节奏 (LBBAP) 与右心室顶部 (RVA) 节奏相比,在患有节奏诱导心肌病的患者中提供了更好的心脏再同步治疗 (CRT). LBBAP在左心室激活中显示出动态变化,这表明了CRT有效性的新机制.
科学领域:
- 心脏病学 心脏病学
- 电子生理学 电子生理学
- 心血管成像 - 心血管成像
背景情况:
- 右心室顶部 (RVA) 节奏可以导致节奏诱导的心肌病 (PICM).
- 双管节律是RVA-PICM的标准心脏再同步疗法 (CRT).
- 左捆分支区域节奏 (LBBAP) 正成为潜在的优越CRT策略.
研究的目的:
- 在患有扩张相性缩性心肌病 (d-HCM) 和PICM的患者从RVA节奏转换为LBBAP期间,研究左心室 (LV) 激活模式的动态变化.
- 探索对LBBAP作为CRT在这个特定患者队列中的有效性的机制性见解.
主要方法:
- 一名患有d-HCM的女性患者,先前的腹腔动心衰减,以及由于RVA节奏 (250毫秒QRS) 而恶化的心力衰竭,接受了CRT升级到LBBAP (160毫秒QRS).
- 在升级后六个月,在RVA节奏和LBBAP期间进行了三维LV激活映射.
- 分析的重点是功能导电阻线和激发传播模式的变化.
主要成果:
- 在RVA节拍过程中,前壁上的功能导电阻塞导致单向,反时钟方向的LV激活,显著的基底-中前壁延迟.
- 在LBBAP中,功能导电块转移到隔膜-角区域,使两向传播到侧壁成为可能.
- 在垂直对立的LV段中,LBBAP促进了同步刺激,与RVA节奏的异步形成鲜明对比.
结论:
- 与LBBAP一起观察到的LV激活模式的动态变化与这种带有隔膜和顶端损伤的d-HCM病例特异.
- 这一案例为从RVA-PICM升级时LBBAP的有益影响背后的机制提供了宝贵的见解.
- 通过实现更同步的心室激活,LBBAP显示了优化CRT的潜力.
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