【分享】Mesh of the Human Heart

FEAnet

TrueGrid® Mesh of the Human Heart
   
http://www.truegrid.com.cn/
  Over the years, more than one model of the human heart has been built using TrueGrid®. This is the earliest model, dating back to the mid-90s. The original data was obtained experimentally and then converted into polygonal surfaces before being read into TrueGrid®.  
  
  More recently, researchers at Duke University have produced a model of portions of the human heart as they analyze the propagation of electrical current flow. They also began with polygonal surface data. Their results have been published in the on-line Journal of Circulation Research, sponsored by the American Heart Association.  
  

FEAnet

Abstract—Although considerable progress has been made in understanding the process of wavefront propagation and arrhythmogenesis in human atria, technical concerns and issues of patient safety have limited experimental investigations. The present work describes a finite volume–based computer model of human atrial activation and current flow to complement these studies. Unlike previous representations, the model is three-dimensional, incorporating both the left and right atria and the major muscle bundles of the atria, including the crista terminalis, pectinate muscles, limbus of the fossa ovalis, and Bachmann’s bundle. The bundles are represented as anisotropic structures with fiber directions aligned with the bundle axes. Conductivities are assigned to the model to give realistic local conduction velocities within the bundles and bulk tissue. Results from simulations demonstrate the role of the bundles in a normal sinus rhythm and also reveal the patterns of activation in the septum, where experimental mapping has been extremely challenging. To validate the model, the simulated normal activation sequence and conduction velocities at various locations are compared with experimental observations and data. The model is also used to investigate paced activation, and a mechanism of the relative lengthening of left versus right stimulation is presented. Owing to both the realistic geometry and the bundle structures, the model can be used for further analysis of the normal activation sequence and to examine abnormal conduction, including flutter. The full text of this article is available at http://www.circresaha.org.  
  
Key Words: atrial computer model • cardiac propagation • atrial conduction • finite volume method

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johnie2004

想请教一下楼主，有没有这个mesh的文件啊？能不能也提供一下啊？

heiye2003

想请教一下楼主，在truegrid中画出这样的模型实在是太easy了，关键是前期的几何划分，问题这样的模型出来有什么用，单元质量可以保证计算嘛？？

heiye2003

这个模型看起来很复杂，实际上可以分解为有限个变形的六面体来处理，这样，用六面体网格投影就好了