Objective:To study the relationship between increased QT dispersion(QTd) and/or JT dispersion (JTd) and long term prognosis in patients with dilated cardiomyopathy (DCM) and severe cardiac dysfunction.

• 目的：探讨QT间期离散度（QTd）和（或）JT间期离散度（JTd）的增加与扩张型心肌病严重心功能不全患者远期预后的关系。