冠状动脉微循环功能障碍可以通过对静止距离冠状动脉压力波形的正二波和振幅指数进行评估,这是一个新开发的指数波形
Yoshiharu Fujimori, Satoshi Hashimoto1, Miki Takahashi1
1Department of Cardiology, Suwa Central Hospital, Tamagawa 4300, Chino, Nagano 391-8503, Japan.
European heart journal open
|July 13, 2023
概括
尽管分流储量较低,但静止远部冠状动脉高压可能表明微循环功能障碍. 咖啡因摄入与更高的幅度指数有关,这表明冠状动脉病变中的血管扩张受损.
科学领域:
- 心血管生理学心血管生理学
- 冠状动脉疾病 冠状动脉疾病
- 微循环是一种微循环.
背景情况:
- 一些冠状动脉病变表现出高静止远距离冠状动脉压/大动脉压 (Pd/Pa) 比率,尽管低分流储备 (FFR).
- 这种现象可能与潜在的微循环功能障碍有关.
研究的目的:
- 为了研究微循环功能障碍作为一个基本机制在高休息Pd/Pa和低FFR的病变.
- 评估咖啡因摄入对冠状动脉微循环动态的影响.
主要方法:
- 在冠状动脉血管造影之前,患者被分为咖啡因 (222毫克) 和非咖啡因组.
- 氨酸诱导的Pd/Pa下降被用来计算振幅指数,反映了微循环反应.
- 有FFR<0.80的病变被分为高残留,中等和低休息Pd/Pa区域.
主要成果:
- 幅度指数在FFR时明显低于静止时的Pd/Pa (0.44 ± 0.12对比0.54 ± 0.11;P < 0.0001).
- 高剩余的Pd/Pa区域显示出比中间区域 (0.48 ± 0.12;P < 0.005) 更高的振幅指数 (0.60 ± 0.09).
- 在高残留区域的病变呈现出更大的正二波 (94%对30%;P <0.005),并且在咖啡因组中更频繁.
结论:
- 具有高幅度指数的高剩余静止Pd/Pa表明严重冠状动脉狭窄的微循环功能障碍.
- 这种功能障碍可能代表了对心肌缺血反应的动脉扩张不足.
- 咖啡因摄入似乎与冠状动脉病变中的血管扩张受损有关.
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