Effects of Different Implantation Angles of Bi-Leaflet Mechanical Heart Valve on Hemodynamics in the Aorta
10.16156/j.1004-7220.2024.04.017
- VernacularTitle:双叶机械瓣膜不同植入角度对主动脉血流动力学的影响
- Author:
Jingxing LIU
1
,
2
;
Xiaoyan DENG
;
Haiyong AO
;
Quanchao ZHANG
Author Information
1. 北京航空航天大学 生物与医学工程学院,生物力学与力生物学教育部重点实验室,北京 100083
2. 华东交通大学 材料科学与工程学院,南昌 330013
- Keywords:
swirling flow;
mechanical heart valve;
aorta;
hemodynamics
- From:
Journal of Medical Biomechanics
2024;39(4):685-690
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the effects of different implantation angles of bi-leaflet mechanical heart valve(BMHV)on swirling flow in the aorta.Methods Based on the aortic CT images of a healthy volunteer,the effects of 4 different valve implantation angles(0°,45°,90° and 135°)on the aortic swirling flow under constant flow conditions were studied by computational simulation.Results The implantation of BMHV could seriously interfere with the aortic swirling flow,affecting the structure and helicity distributions of the swirling flow in ascending aorta,thus resulting in disturbed blood flows distal to the valve.The 135° implantation angle caused the most disruption to the swirling flow,leading to the largest areas of reversed swirling flows,while the 0° and 45° implantation angles caused relatively smaller damage to the swirling flow.The areas with low wall shear stress(<0.5 Pa)were the smallest when the implantation angle of BMHV was 0°.Conclusions At the implantation angle of 0°-45°,the disruption of BMHV to the swirling flow in ascending aorta was relatively small.Therefore,for different patients,the selection of implantation angle should be individualized according to the spatial geometry of their aorta(including the aortic sinuses),and the implantation angle can be determined between 0°-45°.
