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Morphology and biomechanics of human heart

机译:人心脏的形态学和生物力学

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Object of study: A study of the biomechanical characteristics of the human heart ventricles was performed. 80 hearts were extracted during autopsy of 80 corpses of adults (40 women and 40 men) aged 31 -70 years. The samples were investigated in compliance with the recommendations of the ethics committee. Methods: Tension and compression tests were performed with help of the uniaxial testing machine Instron 5944. Cardiometry was also performed. Results: In this work, techniques for human heart ventricle wall biomechanical properties estimation were developed. Regularities of age and gender variability in deformative and strength properties of the right and left ventricle walls were found. These properties were characterized by a smooth growth of myocardial tissue stiffness and resistivity at a relatively low strain against reduction in their strength and elasticity from 31-40 to 61-70 years. It was found that tissue of the left ventricle at 61-70 years had a lower stretchability and strength compared with tissues of the right ventricle and septum. These data expands understanding of the morphological organization of the heart ventricles, which is very important for the development of personalized medicine. Taking into account individual, age and gender differences of the heart ventricle tissue biomechanical characteristics allows to rationally choosing the type of patching materials during reconstructive operations on heart.
机译:研究对象:进行了人类心脏心室生物力学特征的研究。在对80名年龄在31 -70岁的成年人(40名女性和40名男性)的尸体进行解剖的过程中,提取了80颗心脏。按照道德委员会的建议对样本进行了调查。方法:借助单轴测试仪Instron 5944进行拉伸和压缩测试。结果:在这项工作中,开发了用于人类心脏心室壁生物力学性质估计的技术。在左右心室壁的变形和强度特性中发现了年龄和性别变异的规律。这些特性的特征在于,在相对较低的应变下,心肌组织的硬度和电阻率可以平稳增长,从而防止强度和弹性从31-40年降低到61-70年。发现与右心室和隔膜的组织相比,在61-70岁时左心室的组织具有较低的拉伸性和强度。这些数据扩大了对心室形态组织的了解,这对个性化医学的发展非常重要。考虑到心室组织生物力学特征的个体,年龄和性别差异,可以在对心脏进行重建手术期间合理选择修补材料的类型。

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