Objective To detect relationship between dispersion (QTd) of QT and JT dispersion (JTd) and ventricular arrhythmia in elderly patients with acute myocardial infarction (AMI).

• 目的观察急性心肌梗塞（AMI）患者早期心电图QT离散度（QTd）及JT离散度（JTd）的变化，以探讨老年AMI患者QTd、JTd与室性心律失常的关系。