Influence of Tricuspid Bioprosthetic Mitral Valve Orientation Regarding the Flow Field Inside the Left Ventricle: In Vitro Hydrodynamic Characterization Based on 2D PIV Measurements
Influence of Tricuspid Bioprosthetic Mitral Valve Orientation Regarding the Flow Field Inside the Left Ventricle: In Vitro Hydrodynamic Characterization Based on 2D PIV Measurements
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DOI：
10.1111/aor.12515
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发表时间：
2016-02-01
影响因子：
2.4
通讯作者：
Yanagihara, Jurandir I.
中科院分区：
文献类型：
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作者：
Bazan, Ovandir;Ortiz, Jayme P.;Yanagihara, Jurandir I.
主动脉或二尖瓣位置中的人工心脏瓣膜的流动模式可以根据其类型和取向而改变。这项工作描述了使用2D粒子图像测速（PIV）应用于体外流场表征内的左心室模型的上部在不同的心率和作为两个方向的功能的支架三尖瓣二尖瓣生物瓣膜。在心室模型中，每个二尖瓣生物瓣膜（直径27和31 mm）以两个方向安装，旋转180度，而主动脉双叶机械瓣膜（直径27 mm）保持固定方向。结果（N = 50）显示了根据二尖瓣生物瓣膜定位的心室内流场变化。此外，主动脉上游流速曲线的变化是二尖瓣方向的函数。
The flow patterns of a prosthetic heart valve in the aortic or mitral position can change according to its type and orientation. This work describes the use of 2D particle image velocimetry (PIV) applied to the in vitro flow fields characterization inside the upper part of a left ventricular model at various heart rates and as a function of two orientations of stented tricuspid mitral bioprostheses. In the ventricular model, each mitral bioprosthesis (27 and 31 mm diameter) was installed in two orientations, rotated by 180 degrees, while the aortic bileaflet mechanical valve (27 mm diameter) remained in a fixed orientation. The results (N = 50) showed changes in the intraventricular flow fields according to the mitral bioprostheses positioning. Also, changes in the aortic upstream velocity profiles were noticed as a function of mitral orientations.