降低长期死亡率 跨导管大动脉置换后需要患者特异性冠状动脉血液动力学的系统差异化
Seyedvahid Khodaei1, Louis Garber2, Mohamed Abdelkhalek2
1Department of Mechanical Engineering McMaster University Hamilton Ontario Canada.
Journal of the American Heart Association
|May 26, 2023
概括
超导管大动脉置换 (TAVR) 可能会对冠状动脉血流产生不利影响,并增加心脏工作量,尽管减轻了压力梯度. 个性化计算建模可以帮助优化TAVR策略,并监测冠状动脉疾病的进展.
科学领域:
- 心血管医学 心血管医学
- 生物医学工程 生物医学工程
- 计算生物学 计算生物学
背景情况:
- 越来越多地使用过导管大动脉置换 (TAVR),即使在高危患者中也是如此.
- 在TAVR候选人中,冠状动脉疾病 (CAD) 经常与大动脉狭窄共存.
- 塔弗对冠状动脉和心脏血液动力学的长期影响尚未完全理解.
研究的目的:
- 使用患者特定的计算模型调查TAVR对冠状动脉和心脏血液动力学的影响.
- 非侵入性地评估TAVR如何影响冠状动脉血流,左心室工作负荷和冠状动脉壁剪切应力.
主要方法:
- 开发一个多尺度,针对患者的特定计算框架.
- 在TAVR之前和之后的血液动力学的非侵入性模拟.
- 对冠状动脉流速,左心室工作负荷和冠状动脉壁剪切应力的分析.
主要成果:
- TAVR可能会导致心静脉冠状动脉血液流量减少 (例如,右冠状动脉最大流量减少高达22.73%).
- 左心室的工作量可能在TAVR后增加 (2.52%).
- 冠状动脉壁剪切应力可能会在各种冠状动脉分支中减少 (例如,在分叉处高达9.47%).
结论:
- 在TAVR后缓解跨膜压力梯度可能不会改善冠状动脉流量或减少心脏负载.
- 非侵入性个性化计算建模可以为TAVR前的复血管化策略提供信息.
- 这种方法可能有助于在TAVR后监测冠状动脉疾病的进展.
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