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电生理研究表明,QT间期延长反映心肌复极不均一性增加。近年来,人们认为QT离散度(QTD),即心肌最早复极与最晚复极的时间差值,是代表心肌复极不同步的良好指标,并发现QTD增大,可见于急性心肌梗死、应急诱发心肌缺血等多种心脏疾病,且与严重室性心律失常有关,溶栓治疗和经皮冠状
Electrophysiological studies have shown that QT prolongation reflects the increase of myocardial repolarization heterogeneity. In recent years, people think QT Dispersion (QTD), that is, the time difference between the earliest repolarization and the latest repolarization, is a good indicator of myocardial repolarization asynchronism. It is found that QTD increases, which can be seen in acute myocardial infarction, Emergency induced myocardial ischemia and other heart disease, and with serious ventricular arrhythmias, thrombolysis and percutaneous coronary