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Relationship between the dynamics of coronary arteries and coronary atherosclerosis

机译:冠状动脉和冠状动脉粥样硬化的动态与冠状动脉粥样硬化的关系

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It is widely believed that mechanical and fluid dynamic forces acting on the arterial wall are involved in the initiation and progression of atherosclerosis. Since human coronary arteries experience substantial motion during the cardiac cycle,that modulates both local wall mechanics and fluid dynamics, we have hypothesized that certain motion patterns of coronary arteries may play an important role in the pathogenesis of coronary atherosclerosis by generating atherogenic mechanical stresses in or at the vessel wall. To investigate the motion dynamics of the human coronary arteries and explore its biomechanical implications in coronary atherosclerosis, a system has been developed to track and quantify the in vivo motion of coronary arteries from clinical biplane coronary cineangiograms. Using this system, the in vivo dynamics of twelve coronary arteries, consisting of four right coronary arteries (RCA) and eight left anterior descending coronary arteries (LAD), have been characterized. There aresignificant differences between the dynamics of normal RCA's and LAD's, and between the diseased and un-diseased portions of the same LAD. In particular, the maximum torsion in the diseased LAD is associated with the presence of angiographically evidentlesions. The results suggest that certain dynamic parameters of vessel motion may mediate forces important to the development of atherosclerosis.
机译:众所周知,作用在动脉壁上的机械和流体动力涉及动脉粥样硬化的开始和进展。由于人类冠状动脉在心脏周期内经历了大量运动,因此调制局部墙壁力学和流体动力学,我们已经假设冠状动脉的某些运动模式可能在冠状动脉粥样硬化的发病机制中发挥重要作用,通过产生或在船墙上。为了探讨人冠状动脉的运动动态并探讨其在冠状动脉粥样硬化中的生物力学影响,已经开发了一种系统,以跟踪和量化冠状动脉冠状动脉冠状动脉冠状动镜的体内运动。使用该系统,由四个右冠状动脉(RCA)和8个左前期下降冠状动脉(LAD)组成的12个冠状动脉的体内动态。正常RCA和小伙子的动态与同一小伙子的患病和未患病部分之间存在显着差异。特别地,患病LAD中的最大扭转与血管造影术的存在相关联。结果表明,某些血管运动的动态参数可能导致动脉粥样硬化的发育很重要。

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