关于冠状动脉侧支循环,研究资料甚为丰富。冠状动脉损害时,冠状血管阻力增加,局部心肌血流灌注量减少。这种减少并非动脉压增加或氧摄取率增加所能轻易代偿的。但由于冠状动脉损害呈固有的节段性特征,病变一般只累及1支或2支近端大血管,故可由侧支循环的建立而得以代偿。近年来,对于侧支循环的意义,又重新作了许多病理和临床评价。 About coronary collateral circulation, the research data is very rich. Coronary artery injury, coronary vascular resistance increased, local myocardial perfusion decreased. This decrease is not compensated by either an increase in arterial pressure or an increase in oxygen uptake. However, due to coronary artery lesions were inherent segmental features, lesions usually involve only one or two proximal large vessels, it can be set up by the collateral circulation to be compensated. In recent years, for the significance of collateral circulation, again made a lot of pathology and clinical evaluation.