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４７例Ⅱ型糖尿病和４７例非糖尿病患者急性心肌梗塞（ＡＭＩ）后梗塞延伸（ＩＭＥＸＴ）的发生情况表明：Ⅱ型糖尿病患者ＩＭＥＸＴ发生率明显高于非糖尿病患者（Ｐ＜０．０５）；而性别之间无显著性差异（Ｐ＞０．０５）。Ⅱ型糖尿病是ＡＭＩ后易发生ＩＭＥＸＴ的高危因素；高血压、低ＨＤＬ－Ｃ和交感兴奋是Ⅱ型糖尿病患者ＩＭＥＸＴ的促发因素；ＩＭＥＸＴ是Ⅱ型糖尿病患者ＡＭＩ后早期死亡率高的主要原因。
The incidence of infarction extension (IMEXT) in 47 type Ⅱ diabetic patients and 47 non-diabetic patients with acute myocardial infarction (AMI) showed that the incidence of IMEXT in type Ⅱ diabetic patients was significantly higher than that in non-diabetic patients (P <0.05) No significant gender differences (P> 0.05). Type 2 diabetes mellitus is a risk factor for developing IMEXT after AMI. Hypertension, low HDL-C and sympathetic excitation are the contributing factors of IMEXT in type 2 diabetic patients. IMEXT is the major cause of early mortality after AMI in type 2 diabetic patients.