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心肌梗死是由于心肌持久严重缺血而引起的部分心肌坏死。绝大多数是在冠状动脉粥样硬化的基础上合并血栓形成或持续性痉挛使管腔发生急性阻塞而形成的。当寒潮来临气温突降时,人体内去甲肾上腺素突然升高,引起心跳加快,心肌耗氧量增加,全身乃至冠状动脉痉挛。有时仅仅是脚底受凉也会因反射性末
Myocardial infarction is due to myocardial persistent severe ischemia caused by part of myocardial necrosis. The vast majority of coronary artery atherosclerosis based on the merger of thrombosis or persistent spasm of the lumen acute obstruction and the formation. When the sudden arrival of cold wave temperatures, the body suddenly increased norepinephrine, causing rapid heartbeat, myocardial oxygen consumption increased, systemic and coronary artery spasm. Sometimes just because of the soles of the feet will be due to reflex end