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心肌缺血是冠状动脉功能不全的主要后果,也是临床对冠心病处理的中心问题。急性心肌缺血更是对患者健康以至生命的严重威胁。心肌缺血的基本发病原因是:①冠状动脉供血不足;③心肌耗氧过高。急性心肌缺血时,先出现代谢的改变,接着是特有功能的障碍,再出现结构的破坏,最后达到不可逆的损害。心肌耗氧量很高,但储氧量却很少,总量只有0.8mμ%,只可维持心肌收缩8次。氧的来
Myocardial ischemia is the main consequence of coronary insufficiency and is also a central issue in clinical treatment of coronary heart disease. Acute myocardial ischemia is a serious threat to the patient’s health and life. The basic causes of myocardial ischemia are: ① coronary insufficiency; ③ myocardial oxygen consumption is too high. Acute myocardial ischemia, the first metabolic changes, followed by dysfunction of unique features, and then the destruction of the structure, and finally irreversible damage. Myocardial oxygen consumption is high, but the oxygen storage capacity is very small, the total is only 0.8mμ%, only to maintain myocardial contraction 8 times. Oxygen comes