高微血管电阻对冠状动脉波能量的影响取决于冠状动脉微血管功能
Ahmet Tas1,2, Yaren Alan3, Ilke Kara Tas2
1Department of Cardiology, Amsterdam UMC, Heart Centre, Amsterdam Cardiovascular Sciences, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands.
高高血压微血管抵抗 (hMR) 单独并不表明冠状动脉微血管功能障碍 (CMD). 没有降低冠状动脉流量储备 (CFR) 的适应性高hMR表明保持了自我调节能力,避免了误诊.
科学领域:
- 心脏病学 心脏病学
- 生理学 生理学 生理学
- 生物医学工程 生物医学工程
背景情况:
- 在稳定的冠状动脉疾病 (CAD) 中,高高血压微血管抵抗 (hMR) 有着有争议的病理生理学相关性.
- 冠状动脉微血管功能障碍 (CMD) 通常被冠状动脉流量储备减少 (CFR <2.5) 定义.
- 波强度分析 (WIA) 为评估冠状动脉波能量提供了一种方法.
研究的目的:
- 为了比较高hMR对冠状动脉波能量在不阻塞的动脉的影响.
- 区分高hMR与没有CMD之间的区别.
- 调查WIA在表征冠状动脉微血管功能的作用.
主要方法:
- 波强度分析 (WIA) 用于评估冠状动脉波的能量.
- 根据CFR和hMR,患者 (n=258) 被分为四种内型.
- 分析了冠状动脉压力和速度数据,以计算WIA参数.
主要成果:
- "没有CMD高的hMR"内型表现出保留的CFR和强大的自我调节能力,由加速波能量比例 (AEP) 的增加表明.
- 在CMD内型中,高hMR与AEP降低相关 (r=-0.229,P<0.001).
- "没有CMD高的hMR"组表现出最低的静止速度和最高的基底微血管阻力,但保持了基准水平的CFR.
结论:
- 单独高的hMR并不是CMD的确切标志物.
- 增加的hMR可能是适应性的,与保留的CFR和完整的自我调节有关.
- 临床医生应考虑"适应性无CMD高hMR"内型,以防止误诊.
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