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目的 探讨急性心肌梗塞时 (AMI) QT间期离散度增加和心室颤动易感性之间的关系。方法 比较分析2 0例 AMI发病后 2 4h内并发心室颤动的患者 (心室颤动组 )和 2 0例未发生心室颤动的 AMI患者 (对照组 )在急诊入院时体表同步 12导心电图的心前 QT间期离散度和 QTc间期离散度。结果 心室颤动组 QTc间期离散度和 QT间期离散度均显著高于对照组 (分别为 70 ms± 30 ms与 32 ms± 15 ms和 6 7ms± 30 ms与 31ms± 17ms,P<0 .0 0 1)。结论 AMI时心前 QT间期离散度增加产生心室颤动的危险性增加
Objective To investigate the relationship between the increased QT interval dispersion and susceptibility to ventricular fibrillation in acute myocardial infarction (AMI). Methods 20 patients with ventricular fibrillation within 24 hours after onset of AMI (ventricular fibrillation group) and 20 patients with AMI without ventricular fibrillation (control group) were enrolled in this study. QT interval dispersion and QTc interval dispersion. Results The QTc interval dispersion and QT interval dispersion in patients with ventricular fibrillation were significantly higher than those in the control group (70 ms ± 30 ms vs 32 ms ± 15 ms and 6 7 ms ± 30 ms vs 31 ms ± 17 ms, P <0, respectively). 0 0 1). Conclusion There is an increased risk of ventricular fibrillation with an increase of pre-QT dispersion in AMI