Objective To observe the effects and features of dynamic electrocardiagram(DCG)for silent myocardial ischemia(SMI)with diabetes in elderly patients,and to evaluate its value in diagnosis of diabetes with SMI in elderly patients.

• 目的观察动态心电图（DCG）对老年糖尿病患者无症状心肌缺血（SMI）的检出情况及其DCG的特点，评价其在老年糖尿病合并隐匿性冠心病的诊断价值。