急性前壁心肌梗塞时QT间期离散度同左室收缩功能的相关性

Relation between QT Interval Dispersion of Acute Anterior Wall Myocardial Infarction and the Left Ventricular Contractility

目的 :观察急性前壁心肌梗塞 (AMI)时心率校正后 ,QT离散度 (QTcd)与代表左室收缩功能的主动脉血流速度峰值 (PFV)之间的相关性。方法 :44例急性前壁心肌梗塞患者发病 2 4小时内常规作同步 12导联心电图 ,测定QTcd ,同时作多普勒测定PFV。结果 :① 44例AMI患者中所测的QTcd值与文献报道一致 (83 97±43 12ms) ;②按PFV高低分为三组 ,每组QTcd均值之间存在明显统计学差异 (P <0 0 1) ;③PFV与QTcd之间存在着负相关 (r=- 0 7915 )。结论 :急性前壁AMI时 ,QT离散度与左室收缩功能存在着负相关 ,即QT离散度越大 ,而左室收缩功能就越弱。

Objective:In order to explore the relations between QT interval dispersion(QTcd)of acute anterior wall myocardial infarction and PFV showing the left ventricular contractility.Methods:QTcd was measured in a 12-lead resting ECG in 44 patients with anterior AMI.PFV was measured in a color B-us.Results:①The mean of QTcd is accorded with that reported in references(QTcd=83 97±43 12ms);②QTcd is significantly larger in group C than in group A and B( P <0 01),QTcd is significantly larger in group B than in group A( P <0 01);③Negative relation was demonstrated between QTcd and PFV(r=-0 7915).Conclusions:In patients with acute anterior wall myocardial infarction,there is a negative relation between QTcd and the left ventricular contractility.