在心室动中相异常的空间分布
Miguel Valderrábano1, Peng-Sheng Chen, Shien-Fong Lin
1Division of Cardiology, Department of Medicine, Cedars-Sinai Medical Center and David Geffen School of Medicine, University of California Los Angeles, Calif 90048, USA.
Circulation
|July 2, 2003
概括
在心室动 (VF) 中,相异常 (PSs) 不是随机的. 它们沿着解剖结构聚集在一起,影响VF复杂性,并可能指导新的突然死亡疗法.
科学领域:
- 心脏电生理学 心脏电生理学
- 计算生物学 计算生物学
- 医疗成像医学成像
背景情况:
- 心室动 (VF) 涉及多个刺激波,但它们的组织尚未完全理解.
- 阶段奇点 (PSs) 是VF的关键来源,代表模两可的激活和潜在的重新进入的位置.
- 了解PS形成机制对于开发有效的突然心脏死亡疗法至关重要.
研究的目的:
- 在心室动 (VF) 期间调查相异常 (PSs) 的空间组织和分布.
- 确定PS形成与心脏解剖结构之间的关系.
- 阐明PS行为如何为VF中观察到的复杂激活模式做出贡献.
主要方法:
- 在光学记录信号上使用自动化PS检测算法在纤维化心室中执行电压,相位和PS映射.
- 相关的PS位置具有微观解剖特征,包括纤维对应和内壁血管.
- 分析了PS寿命,发病率和空间分布,包括行为分析的自相关性.
主要成果:
- 阶段奇点 (PSs) 呈现出非随机的集群沿着心上血管,内心轨道脊和乳头肌肉插入.
- 这些解剖结构起到了稳定者的作用,PSs对它们的同位化显示了显著更长的寿命 (82.46 ms与40.5 ms).
- 右心室内脏表现出比上心脏更高的PS发生率;不规则的行为在空间上受限于解剖学异质性.
结论:
- 在VF中,相异常 (PSs) 是空间有组织的,并与正常的解剖学异质性共定位.
- 稳定的PS空间分布,加上可变的PS行为和寿命,产生了复杂的,动态的激活模式,这是VF的特征.
- 这种非随机分布为VF机制和潜在的治疗点提供了洞察力.
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