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对60例急性心肌梗死（AMI）病例，在发病48h内首次描记的心电图（ECG）QT间期离散度（QTd）与JT间期离散度（JTd）进行了测定。结果显示：QT间期离散度和JT间期离散度的增加与AMI早期室速和原发性室颤的发生率呈正相关，AMI早期室速、室颤患者的QTd与JTd（100．48±27．60ms与100．50±23．10ms）显著高于非室速、室颤组（46．80±18．00ms与48．40±18．00ms），（P＜0．01）。随着QTd和JTd值的增大，室速、室颤发生的可能性也增大。提示：QTd和／或JTd可作为预测室速、室颤的一个重要指标，从而也可作为判断AMI早期预后较可靠的参考指标。
The QTd and JTd of electrocardiogram (ECG) were recorded in 60 AMI patients within 48 hours of onset. The results showed that the increase of QT interval dispersion and JT interval dispersion was positively correlated with the incidence of early ventricular tachycardia and primary ventricular fibrillation in AMI, and the QTd and JTd (100.48 ± 27.60ms and 100.50 ± 23.10ms) were significantly higher than those in non-ventricular fibrillation group (46.80 ± 18.00ms and 48.40 ± 18.00ms), respectively (P <0.01). With the increase of QTd and JTd, the possibility of ventricular tachycardia and ventricular fibrillation also increased. It is suggested that QTd and / or JTd can be used as an important index for predicting VT and VF, and thus can be used as a reliable reference for judging early prognosis of AMI.