导致持续心室低心率与多个QRS形态的机制:在心脏梗塞的狗心脏中绘制研究的结果
C Costeas1, N S Peters, B Waldecker
1Department of Pharmacology, College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA.
Circulation
|December 13, 1997
概括
同一个心脏中的多个心室动脉冲动 (VT) 形态通常来自同一个心脏病发作区域. 不同的回流电路特性解释了这些多样化的VT呈现.
科学领域:
- 心血管电生理学 心血管电生理学
- 心脏病理生理学 心脏病理生理学
背景情况:
- 持续的回流性心室动脉动脉 (VTs) 与不同的QRS形态发生在人类中.
- 在心肌梗塞 (MI) 中,多个静脉道形态背后的机制需要阐明.
研究的目的:
- 调查导致多个QRS形态的心室动脉动脉障的机制.
- 在犬类心肌梗塞模型中绘制回流回路.
主要方法:
- 在4天前心脏病发作的狗心脏中诱导具有多个QRS形态的复发性静脉瘤.
- 与不同静脉瘤形态相关的回流回路的表心映射.
主要成果:
- 在11只狗心脏中诱导了多个静脉道形态.
- 确定了多种形态的两个主要机制:在不同心脏病发作区域或更常见的是,在同一区域的回流回路.
- 在同一区域,反入波前方向的变化,块范围的线或电路大小/形状的变化产生了不同的形态.
结论:
- 多重静脉形态通常来自同一心脏病发作区域内的回流回路.
- 这表明,一个具有特定电生理性质的局部区域维持了重新进入,导致了多样化的VT呈现.
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