Objective To predict prospectively viable myocardium withcombined use of low-dose dobutamine echocardiography(LDDE) and myocardial contrast echocardiography(MCE).

• 目的前瞻性评价小剂量多巴酚丁胺超声心动图(LDDE)联合心肌声学造影(MCE)对心肌梗死后存活心肌的诊断价值。