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对本院近７年收入ＣＣＵ的３２０例心肌梗死（ＡＭＩ）患者进行了观察，按（１）ＣＫ－ＭＢ和（或）ＣＰＫ复升；（２）心电图ＳＴ段再次抬高及出现新的病理性Ｑ波或原有Ｑ波加深伴Ｒ波降低；（３）临床症状恶化等３项中２项作为梗死区延伸（ＩＥｘｔ）的临床诊断标准。糖尿病组５６例中共检出ＩＥｘｔ１７例（３０．３６％），无糖尿病组２６４例中检出ＩＥｘｔ２４例（９．１％），差异显著。糖尿病ＡＭＩ并发ＩＥｘｔ较多与其冠脉病变范围及严重程度发展有关，糖尿病的微血管病变、心肌对缺血的代谢调节障碍以及血小板聚集性、粘附性增高均与之有重要关系。
320 patients with myocardial infarction (AMI) who received CCU for nearly seven years in our hospital were observed as (1) CK-MB and / or CPK ascended; (2) ST segment elevation and new pathology Sexual Q wave or the original Q wave deepening with R wave reduction; (3) two of the three clinical symptoms worsen as the clinical diagnostic criteria of infarct extension (IExt). Among 56 cases of diabetes mellitus, 17 cases of IExt were detected (30.36%), 24 cases of IExt were found in 264 cases of non-diabetic group (9.1%), the difference was significant. Diabetes mellitus complicated with IExt more associated with the extent and severity of coronary lesions related to the development of microvascular disease of diabetes, myocardial metabolic regulation of ischemia and platelet aggregation, increased adhesion are associated with it.