概括
在各种心脏病中,左心室的放松受损,包括多变性心肌病症和心心管狭窄症. 这种异常可能是左心室机械功能障碍的早期迹象.
科学领域:
- 心脏病学 心脏病学
- 心血管生理学心血管生理学
背景情况:
- 左心室 (LV) 放松对于透缩功能至关重要.
- 在许多心脏病中观察到LV放松的异常.
研究的目的:
- 在患有各种心肌病和膜性心脏病的患者中,使用时间常数T和峰值负dP/dt来研究和量化左心室 (LV) 放松.
- 为了确定LV放松异常是否是机械功能障碍的早期指标.
主要方法:
- 在患有高压心肌病 (HCM),充血性心肌病 (CCM),高血压心脏病 (HHD),冠状动脉疾病 (CAD) 的患者中研究了LV放松,有/没有异能,心肌狭窄 (MS) 和心肌反 (MR).
- 使用时间常数T和峰值负dP/dt作为LV放松的主要指标.
- 包括18名正常受试者作为对照.
主要成果:
- 与正常对照组相比,时间常数T在HCM,CCM,CAD (有和没有异能) 和MS中显著延长.
- 峰值负dP/dt在HCM,CCM,CAD与异能,MS和MR中显著减少.
- 在老年正常人中也观察到时间常数T的延长,这表明衰老有助于放松功能受损.
结论:
- LV放松异常在一系列心脏疾病中普遍存在,包括心肌病和膜疾病.
- LV 放松障碍的确切原因似乎是多因素的.
- LV放松异常可能代表人类左心室机械功能障碍的最早迹象之一.
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