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Updated: Jul 16, 2026

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阐明残留狭窄后心动脉支架的血液动力学影响:一个数值研究

Xianghao Zhang1,2, Zhenmin Fan1, Pengfei Zhao3

  • 1School of Mechanical Engineering, Jiangsu University of Technology, Changzhou, Jiangsu, China.

Medical physics
|September 10, 2024
PubMed
概括

动脉支架后的残留狭窄与血液动力学不佳有关. 根据病变特征优化支架的放置是防止像复原症这样的不良结果的关键.

关键词:
頸動脈動脈支架 頸動脈動脈支架頸動脈的幾何學狀態.血液动力学 血液动力学剩余的狭窄症 剩余的狭窄症

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Blood Flow01:29

Blood Flow

Blood is pumped by the heart into the aorta, the largest artery in the body, and then into increasingly smaller arteries, arterioles, and capillaries. The velocity of blood flow decreases with increased cross-sectional blood vessel area. As blood returns to the heart through venules and veins, its velocity increases. The movement of blood is encouraged by smooth muscle in the vessel walls, the movement of skeletal muscle surrounding the vessels, and one-way valves that prevent backflow.
Regulation of Stroke Volume01:27

Regulation of Stroke Volume

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Cardiac Output II: Effect of Stroke Volume on Cardiac Output

Cardiac output (CO), the amount of blood the heart pumps per minute, is a parameter in cardiovascular physiology determined by stroke volume and heart rate. Stroke volume, the amount of blood pushed from one of the ventricles per heartbeat, is influenced by preload, afterload, and contractility.
Preload
Preload refers to the initial elongation of the cardiac myocytes before contraction and is related to the volume of blood filling the heart at the end of diastole, or end-diastolic volume. The...
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Applications of Integration to Find Blood Flow

Blood flow through a cylindrical blood vessel can be mathematically described using the principles of laminar flow, a regime in which fluid moves smoothly in parallel layers. In this model, the velocity of the blood is not uniform across the cross-section of the vessel; rather, it varies with the radial distance from the center. The maximum velocity occurs along the central axis, decreasing progressively toward the vessel walls, where it reaches zero due to viscous drag.Approximating Blood...