Hemodynamic performance of tissue-engineered vascular grafts in Fontan patients.

Hemodynamic performance of tissue-engineered vascular grafts in Fontan patients.
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DOI:
10.1038/s41536-021-00148-w
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发表时间:
2021-07-22
影响因子:
7.2
通讯作者:
Breuer CK
Breuer CK
中科院分区:
医学1区
文献类型:
--
作者:
Schwarz EL;Kelly JM;Blum KM;Hor KN;Yates AR;Zbinden JC;Verma A;Lindsey SE;Ramachandra AB;Szafron JM;Humphrey JD;Shin'oka T;Marsden AL;Breuer CK

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在先天性心脏外科领域,组织工程血管移植物(TEVGs)是一种很有前途的替代传统合成移植物的方法。我们团队率先在Fontan手术中使用TEVGs作为下腔静脉和肺动脉之间的管道。移植物重塑的自然历史及其对血流动力学性能的影响还没有得到很好的描述。在这项研究中,我们对美国第一个评估TEVGs治疗先天性心脏病的临床试验进行了详细的分析。我们显示了移植物重塑的两个不同的阶段:移植物几何形状快速变化的早期阶段和持续生长和移植物硬度降低的第二阶段。使用临床信息和患者特定的计算流体动力学(CFD)模拟,我们演示了TEVG几何形状、厚度和硬度的变化如何影响患者的血流动力学。我们发现,尽管临床观察到移植物狭窄程度,患者的血流动力学指标仍保持在正常范围内。这些见解加强了对这项技术的持续临床评估,同时支持最近的迹象,即可逆性移植物狭窄可以很好地耐受,因此建议在临床干预之前保持谨慎。
In the field of congenital heart surgery, tissue-engineered vascular grafts (TEVGs) are a promising alternative to traditionally used synthetic grafts. Our group has pioneered the use of TEVGs as a conduit between the inferior vena cava and the pulmonary arteries in the Fontan operation. The natural history of graft remodeling and its effect on hemodynamic performance has not been well characterized. In this study, we provide a detailed analysis of the first U.S. clinical trial evaluating TEVGs in the treatment of congenital heart disease. We show two distinct phases of graft remodeling: an early phase distinguished by rapid changes in graft geometry and a second phase of sustained growth and decreased graft stiffness. Using clinically informed and patient-specific computational fluid dynamics (CFD) simulations, we demonstrate how changes to TEVG geometry, thickness, and stiffness affect patient hemodynamics. We show that metrics of patient hemodynamics remain within normal ranges despite clinically observed levels of graft narrowing. These insights strengthen the continued clinical evaluation of this technology while supporting recent indications that reversible graft narrowing can be well tolerated, thus suggesting caution before intervening clinically.
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