脑血液动力学和中风风险在有症状的内动脉缩狭窄与内部与皮质边缘区心脏病发作:一个计算流体动力学研究
Shuang Li1, Xuan Tian1, Bonaventure Ip1
1Department of Medicine & Therapeutics, the Chinese University of Hong Kong, Hong Kong SAR, China.
概括
在中脑动脉狭窄中,内部和皮质边缘区心脏病发作有不同的原因. 低压比表明内部边界区心脏病发作中的流量受损,而皮质心脏病发作则表明栓塞. 内部边界区域心脏病发作具有更高的短期中风复发风险.
科学领域:
- 神经学 神经学
- 血管神经学 血管神经学
- 神经成像是一种神经成像.
背景情况:
- 内动脉硬性狭窄,特别是中脑动脉 (MCA),可能导致边界区心脏病发作.
- 边界区域心脏病发作被分为内部 (IBZ) 或皮质 (CBZ),可能由不同的病理生理机制引起.
研究的目的:
- 在中脑动脉 (MCA) 动脉硬化狭窄症患者中,研究潜在的内部边界区心脏病发作 (IBZ) 和皮质边界区心脏病发作 (CBZ) 的不同机制.
- 为了将心脏病发作模式与血液动力学因素相关联,并评估随后的中风风险.
主要方法:
- 分析了84名患有症状的50-99%MCA-M1动脉样硬化和急性边缘区心脏病发作的患者.
- 心脏病发作模式 (隔离IBZ,隔离CBZ,IBZ+CBZ) 使用扩散权重成像进行分类.
- CT血管造影和计算流体动力学 (CFD) 模型量化了MCA狭窄的压力比 (PR).
主要成果:
- 患有IBZ心脏病发作的患者更有可能具有较低的PR,这表明降级前流量受损 (p=0.012).
- 患有CBZ心脏病发作的患者更有可能同时患有小皮质心脏病发作,这表明血栓塞 (p=0.004).
- 低PR独立地与孤立的IBZ心脏病发作相关 (aOR=4.223;p=0.026).
- 孤立的IBZ心脏病发作显示,与孤立的CBZ心脏病发作相比,在3个月内出现同一区域缺血性中风复发的风险更高 (17.9%对0.0%;p=0.023).
结论:
- 在MCA狭窄症中,内部和皮质边缘区心脏病发作可能是由不同的机制造成的:IBZ的流量受损,CBZ的栓塞.
- 使用PR进行血液动力学评估可能有助于区分心脏病发作机制.
- 与单独的CBZ心脏病发作患者相比,单独的IBZ心脏病发作患者面临更高的中风复发的短期风险.
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