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为了观察急性心肌梗塞（ＡＭＩ）病人ＱＴ离散度（ＱＴｄ）的变化，我们测定了２５例ＡＭＩ患者的ＱＴｄ、心率校正ＱＴ离散（ＱＴｃｄ）和改良心率校正ＱＴ离散度（ＱＴＬｃｄ），并与２５例正常对照比较，发现ＡＭＩ组上述三个指标均明显高于对照组（Ｐ＜０．００１），且ＡＭＩ随病情好转，上述三个指标也明显下降（Ｐ＜０．００１），同时发现ＡＭＩ有室性心律失常组较无室性心律失常组上述三个指标明显增高（Ｐ＜０．０１）。提示ＱＴ离散度可作为ＡＭＩ疾病转归及预测室性心律失常的指标。
To examine changes in QTd in patients with acute myocardial infarction (AMI), we measured QTd, QTd, and QTLcd in 25 patients with AMI and 25 patients with AMI Compared with the normal control group, the above three indexes of AMI group were significantly higher than that of the control group (P <0.001), and AMI was significantly decreased with the improvement of the disease (P <0.001) Compared with non-ventricular arrhythmia group, the above three indexes of ventricular arrhythmia group were significantly higher (P <0.01). Tip QT dispersion can be used as an index of AMI disease prognosis and prediction of ventricular arrhythmia.