狭窄度和斑块负担在供应缺血区的主要心上冠状动脉之间有所不同
Tanja Kero1, Juhani Knuuti2, Sarah Bär3
1Nuclear Medicine & PET, Department of Surgical Sciences, Uppsala University, Uppsala, Sweden; Turku PET Centre, Turku University Hospital and University of Turku, Turku, Finland.
概括
左前下垂动脉的狭窄和斑块积累比其他冠状动脉更严重,影响心肌缺血. 斑块负担,特别是非化斑块,预测所有主要动脉的缺血.
科学领域:
- 心血管成像 - 心血管成像
- 干预心脏病学 干预心脏病学
- 动脉样硬化研究 动脉样硬化研究
背景情况:
- 冠状动脉疾病 (CAD) 的表征仍然是不完整的关于狭窄和斑块负担在主要心上动脉供应缺血地区的差异.
- 了解这些变异对于在怀疑冠状动脉阻塞性疾病的患者中准确诊断和风险分层至关重要.
研究的目的:
- 在心肌缺血患者中,研究和比较冠状动脉狭窄,斑块负担和左前下降 (LAD),左环 (LCX) 和右冠状动脉 (RCA) 之间的组成.
- 确定狭窄和斑块特征在不同冠状动脉中肌肉心脏缺血的预测值.
主要方法:
- 一组837名有症状的患者接受了冠状动脉计算机断层扫描血管造影 (CTA) 和15O-水正子发射断层扫描 (PET) 心肌输液成像.
- 人工智能引导的定量计算断层扫描 (AI-QCT) 用于分析冠状动脉CTA的狭窄和动脉硬性斑块特征 (例如,百分比动脉瘤体积 [PAV],百分比非化斑块体积 [NCPV],百分比化斑块体积 [CPV]).
- 心肌缺血是由LAD,LCX和RCA地区的区域性PET perfusion deficits定义的.
主要成果:
- 与LCX和RCA相比,LAD动脉的狭窄,绝对斑块体积和正常化的斑块体积显著增加 (P < .001).
- 多变量逻辑回归显示,直径狭窄 (P = .001.015),PAV (P < .001) 和NCPV (P = .001.017) 与所有三个动脉的缺血有关.
- 百分比化斑块体积 (CPV) 仅在RCA中与缺血显著相关 (P = .001).
结论:
- 在LAD和其他主要冠状动脉 (LCX,RCA) 之间的狭窄和动脉硬化负担存在显著差异,无论缺血状态如何.
- 光线狭窄和斑块负担,主要是非化斑块,是三大冠状动脉中心肌缺血的独立预测因素.
- 供应缺血区域的血管中很大一部分表现出较低的狭窄和斑块负担,特别是在LCX和RCA,突出了仅基于直径狭窄和PAV的缺血预测的局限性.
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