Abstract —To substantiate a common mechanism for the flow around the flow channel of the heart left ventricle regardless of the species, the orientation of trabeculae in the left ventricular cavity was anatomically studied in humans and model animals of different sizes, including rats, rabbits, and dogs. Left ventricular cavity casts were used to measure the parameters of the intracardiac trabecular meshwork in humans and animals. Casts of approximately the same size were used in each species to improve the reliability of measurements. Exact solutions of nonstationary hydrodynamics equations for the class of tornado-like swirling flows of viscous fluids were used as a hydrodynamic model to estimate the parameters of the intracardiac blood flow. The degree of twisting was plotted as dependent on the volumetric index of the intracardiac tornado-like jet; the resulting plots showed the continuity of the hyperbolic function for all casts with a high data fitting accuracy ( R 2 varied from 0.7963 to 0.9081). All points of the dependences therefore corresponded to the convergence condition $${{Z}_{i}}R_{i}^{2}$$ = const and might belong to a singular swirling jet and form its boundary layer. Plots of the volumetric change of the jet vs. the longitudinal coordinate were obtained at different angles of cast fixation and were linear in all cases. Given the high fitting accuracy of the data ( R 2 varied from 0.7882 to 0.8853), the pattern of swirling and the accumulation of the energy of a moving dominant flow were assumed to be similar in humans and animals. The results thus demonstrated that the orientation and coordinated contractions of the trabecular meshwork play a crucial role in the formation of a swirling intracardiac blood flow and agree with general mechanisms of adequate blood flow in humans and animals regardless of the size of the flow channel of the heart.

中文翻译：

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基于粘性流体龙卷风流概念的不同体型动物左心室旋流参数的比较解剖学研究

摘要——为了证实心脏左心室流道周围流动的共同机制，无论物种如何，在人类和不同大小的模型动物（包括大鼠、兔、和狗。左心室腔模型用于测量人和动物心内小梁网的参数。在每个物种中使用大约相同尺寸的铸件以提高测量的可靠性。非平稳流体动力学方程的精确解用于粘性流体的类似龙卷风的涡流流类，用作流体动力学模型来估计心内血流的参数。扭曲的程度被绘制为依赖于心内龙卷风状射流的体积指数；结果图显示了所有模型的双曲线函数的连续性，具有高数据拟合精度（R 2 从 0.7963 到 0.9081 变化）。因此，所有依赖点都对应于收敛条件 $${{Z}_{i}}R_{i}^{2}$$ = const 并且可能属于一个奇异的旋流喷射并形成其边界层。射流体积变化与纵坐标的关系图是在不同的石膏固定角度下获得的，并且在所有情况下都是线性的。鉴于数据的高拟合精度（R 2 从 0.7882 变化到 0.8853），假设人类和动物的旋转模式和移动主导流的能量积累是相似的。