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The Role of Blood Vessels in Rabbit Propagation Dynamics and Cardiac Arrhythmias

机译:血管在兔繁殖动态和心脏心律失常中的作用

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Recent experimental findings have suggested the important role played by blood vessels within the heart in stabilising arrhythmias. However, this link has yet to be explored computationally. In this paper, we develop a computational framework to model fibre orientation around structural inhomogeneities in myocardial tissue based on information obtained from high-resolution histological and MRI images. This framework allows the simulation of cardiac wavefront propagation for a generalised vessel orientation and position within the ventricular wall and transmural fibre architecture around it. We simulate propagation following different stimulation protocols around a transmural and a subepicardial vessel, using both bidomain and monodomain representations. We demonstrate the importance of accurately modelling the fibre structure around blood vessels relative to a simplistic transmurally varying fibre orientation model and suggest how this may impact pro-arrhythmic electrical dynamics.
机译:最近的实验结果表明血管在稳定心律失常中的心脏内血管发挥的重要作用。但是,此链接尚未计算地探索。在本文中,我们基于从高分辨率组织学和MRI图像获得的信息,开发一种计算围绕心肌组织结构不均匀性的纤维取向的计算框架。该框架允许模拟心脏波前传播以用于通用血管取向和室内壁内的位置和其周围的透气纤维架构。我们使用双胞苷和单域表示在透射率和心血管血管周围的不同刺激协议之后的传播。我们证明了相对于血管周围的纤维结构相对于简单的透气变化的纤维取向模型来表明重要性,并表明这可能会影响前心律失常的电力动力学。

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