Objective To evaluate the variations of QT dispersion ( QTd ) before and after intravenous thrombolysis and the effects of early reperfusion in patients with acute myocardial infarction(AMI).

• 目的 观察急性心肌梗死 (AMI)病人溶栓治疗前后QT离散度 (QTd)动态变化及早期再灌注对QTd的影响。