在心痛和非阻塞性冠状动脉的功能评估:从微血管抵抗储备到冠状动脉微血管功能障碍的亚型
Domenico Galante1, Andrea Viceré2, Ciro Pollio Benvenuto2
1Center of Excellence in Cardiovascular Sciences, Ospedale Isola Tiberina, Gemelli Isola.
Journal of cardiovascular medicine (Hagerstown, Md.)
|January 22, 2025
概括
微血管阻力储备 (MRR) 和冠状动脉流量储备 (CFR) 是可互换的,用于评估心痛患者的冠状动脉微血管功能障碍 (CMD). 微循环阻力指数 (IMR) 是区分CMD亚型的关键.
科学领域:
- 心脏病学 心脏病学
- 血管生物学 血管生物学
- 诊断成像 诊断成像 诊断成像
背景情况:
- 冠状动脉微血管功能障碍 (CMD) 是一种复杂的疾病,其特点是冠状动脉流量储备 (CFR) 减少.
- 新的指数"微血管抵抗储备" (MRR) 已经出现,但其临床实用性需要进一步研究.
- 了解不同CMD亚型的血液动力学特征对于准确的诊断和管理至关重要.
研究的目的:
- 调查功能指数之间的关系,包括MRR,CFR和微循环阻力指数 (IMR),在患有心痛和非阻塞性冠状动脉 (ANOCA) 的患者中.
- 评估不同CMD亚型的血液动力学特征.
- 评估MRR在识别CMD的诊断性能.
主要方法:
- 连续的ANOCA患者使用玻尿酸热稀释技术进行了评估.
- 计算了CFR,IMR和MRR,并将它们关联起来.
- 根据CFR和IMR值,患者被分为正常,高高血压抗性CMD (HHR-CMD) 和低高血压抗性CMD (LHR-CMD) 组.
主要成果:
- MRR与CFR有很强的相关性 (r=0.968,P<0.01) 并且在检测CMD时具有很高的准确性 (85%).
- LHR-CMD患者表现出微血管阻力降低和静止流量增加,而HHR-CMD患者的高血压流量受损.
- 在CMD患者中,MRR显著降低,但在CMD亚型之间没有观察到显著差异.
结论:
- 在ANOCA患者中评估CMD时,MRR和CFR在功能上可以互换.
- IMR在区分不同的CMD内型中发挥着关键作用.
- 这些发现支持使用MRR作为评估冠状动脉微血管功能的有价值工具.
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