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心肌梗塞是冠状动脉闭塞，血流中断，部分心肌因严重的持久性缺血缺氧而发生局部坏死。高压氧治疗就是使机体的血氧含量增加，血氧张力提高，进而增加心肌组织内氧的林弥散距离。同时促进侧枝循环的建立，使缺血区获得新的血供。这样既保护了缺血的心肌细胞，又降低了心肌细胞的应激性，抑制了室早及室颤的发生，对心肌梗塞再发起了预防作用。
Myocardial infarction is coronary artery occlusion, blood flow interruption, partial myocardial necrosis due to severe persistent hypoxia and local necrosis. Hyperbaric oxygen therapy is to make the body’s blood oxygen content increased, blood oxygen tension increased, thereby increasing myocardial oxygen diffusion within the forest Lin distance. At the same time to promote the establishment of collateral circulation, the ischemic area to obtain a new blood supply. This not only protects the ischemic cardiomyocytes but also reduces the stress of cardiomyocytes, inhibits the occurrence of ventricular premature ventricular fibrillation and ventricular fibrillation, and then plays a preventive role in myocardial infarction.