BACKGROUND:The QT couple dissociation(QTcd) of ECG in patients with chronically coronary ischemia is much longer than that in healthy aged people. Some Chinese medical preparation can correct the prolongation.

• 背景:慢性冠状动脉缺血患者心电图QT间期离散度(QTcoupledissoci-ation,QTcd)比健康老年人要长,有些中药制剂能对这种异常延长加以纠正。