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三叶式与双叶式大动脉的TAVR后机械学:来自计算机模拟的见解

Breandan B Yeats¹, Aniket Venkatesh¹, Sri Krishna Sivakumar¹

¹Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia, USA.

|November 20, 2025

概括

在患有双主动脉 (BAV) 的患者中,通过导管的大动脉置换 (TAVR) 与三叶式相比,显示出更糟糕的模拟机械结果. BAV患者的高量进一步影响了这些TAVR结果.

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
遗传性心脏缺陷遗传性心脏缺陷

背景情况:

双动脉 (BAV) 疾病是最常见的先天性心脏缺陷,其特点是圆形门的开口和增加的化.
关于跨导管大动脉置换 (TAVR) 特别针对BAV患者的长期有效性的数据有限.

研究的目的:

为了比较BAV患者和三叶甲状腺膜 (TAV) 患者的模拟后TAVR机械性能.
评估关键的机械指标,包括支架扩张,小册子应力和孔面积,在模拟的TAVR程序中对BAV和TAV解剖学进行评估.

主要方法:

利用TAVR前的三叶片 (n=22) 和BAV (n=25) 患者的计算机断层扫描来细分大动脉.
模拟的气球可扩展支架部署和随后的生理压力应用在生物假体的传单上.
测量了支架腰部膨胀比,面积比 (AR),规范化几何孔面积 (GOA) 和最大的叶片透气应力.

主要成果:

与三叶片患者相比,BAV患者表现出明显较低的腰部扩张比率 (87.8% vs 89.4%),腰部AR (94.6% vs 98.2%) 和较低的正常化GOA (88.9% vs 89.5%).
BAV患者在模拟后的TAVR后经历了更高的最大叶片透静压力 (2.81MPa与2.29MPa) .
在BAV患者中,较高的体积与腰部AR (r=-0.75) 更差,GOA正常化 (r=-0.68) 和最大应激增加 (r=0.66) 强烈相关.

结论:

在BAV患者中使用气球可扩展的模拟TAVR导致机械性能低于三叶式大动脉患者.
在BAV解剖学中存在高体积是TAVR后与较差的模拟机械结果相关的重要因素.

关键词:

双主动脉门的双主动脉门甲状腺膜疾病甲状腺膜疾病计算建模计算建模通过导管更换大动脉门.

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