Twenty six patients with old myocardial infarction received the tests of two dimensional echocardiography with Dob and were divided into viable myocardium(VM) group and non viable myocardium(NM) group.

• 经Dob超声心动图检测，将26例陈旧性心肌梗塞患者分为存活心肌（VM）组和无存活心肌（NM）组；