人体血液循环系统是一个由动脉、静脉和许多微血管及各种组织细胞组成的整体。每个人出生时的血管内皮都是光滑的,随着年龄的增长,血液中的脂肪和胆固醇会慢慢沉积,使血管内皮慢慢变厚,血管管腔慢慢变窄,每年变窄1%～2%,有高血压、高血黏度、糖尿病者更为严重,每年变窄3%～4%或以上。当动脉血管堵塞75%以上,血流量过少时,人就会有胸 The human circulatory system is a whole made up of arteries, veins and many capillaries and various tissue cells. Everyone at birth, the vascular endothelium is smooth, with age, blood fat and cholesterol will slowly deposited, so that the vascular endothelial thickening slowly, slowly narrowing of the vascular lumen, each narrowing 1% ~ 2%, with high blood pressure, high blood viscosity, more severe diabetes, each narrowing 3% to 4% or more. When the arterial blockage of more than 75%, blood flow is too small, people will have a chest