【摘要】 利用放射性生物微球技术,研究了犬在急性心肌缺血时,侧支循环血流量的再分布,在结扎左前降支冠脉后,中心缺血区血流量明显减少。近边缘区血流量大于中心缺血区血流量,小于远边缘区和非缺血区的血流量。中心缺血区和近边缘区的心内膜下层心肌血流量低于心外膜下层心肌血流量,两者之比小于1.00。随着缺血时间的延长(1—6小时),中心缺血区血流量逐渐减小,而非缺血区的血流量逐渐增加。更多还原

【Abstract】 The authors studied the redistribution of the myocardial blood flow with radioactive biomicrospheres in dogs suffering from acute myocardial ischemia. After the left anterior descending coronary vessel was ligated, there was a great decrease in blood flow of the central ischemic zone. The blood flow of the zone near the border was greater than the central ischemic zone, and was less than the zone far from the border and the nonischemic zone. The endocardial blood flow of the central ischemic zone and the zone near the border became less than the epicardial blood flow (end./epi<1.00). There was a decrease in the blood flow of the central ischemic zone, and an increase in blood flow of the non-ischemic zone, while the ischemic time was prolonged.更多还原