Methods: Left ventricular function were detected using acoustic quantification (AQ)technology,and occurrence of cardiac arrhythmia were recorded by 24 hours dynamic e feet rocard iogram (DCG ).

• 方法：用超声声学定量技术检测54例患者的心功能并根据患者有无左心室腔增大分为左心室重构组（34例）及非左心室重构组（20例），同时设正常对照组（30例），用24小时动态心电图观察其中45例患者心律失常发生情况。