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急性心肌梗塞（ＡＭＩ）时梗塞部位与正常心肌之间存在缺血区域，缺血区心肌细胞跨膜动作电位复极化延缓，各部位心肌细胞复极不一致，表现为心室复极的离散度增加，心室易损期延长，恶性室性心律失常的发生率增高，ＡＮＩ的病死率也相应增高。本文观察了３６例ＡＭＩ患者发病２或３日的ＱＴ、ＪＴ离散度，并与２５例健康人作对照，结果表明：ＡＭＩ组ＱＴｄ、ＪＴｄ较对照组显著增大（Ｐ＜００５），发病后早期死亡组（８例）ＡＴｄ、ＪＴｄ较存活组（２８例）明显增大（Ｐ＜００１）。认为用ＱＴｄ、ＪＴｄ增大来评价ＡＭＩ患者的早期预后有一定意义，且ＱＴｄ、ＪＴｄ监测方法简便、易测、无创伤性。
There is ischemic area between infarction site and normal myocardium in acute myocardial infarction (AMI), delayed repolarization of transmembrane action potential of ischemic myocardium and inconsistent repolarization of myocardial cells in all regions, which is manifested by increased dispersion of ventricular repolarization , Prolonged ventricular vulnerability, increased incidence of malignant ventricular arrhythmia, ANI mortality also increased accordingly. In this study, we observed the QT and JT dispersion of 36 patients with AMI at 2 or 3 days and compared them with 25 healthy people. The results showed that QTd and JTd in AMI group were significantly higher than those in control group (P <005) The incidence of ATd and JTd in the early death group (n = 8) was significantly higher than that in the survival group (n = 28) (P <001). That QTd, JTd increased to evaluate the early prognosis of patients with AMI have some significance, and QTd, JTd monitoring method is simple, easy to measure, non-invasive.