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目的评价QT离散度对急性心肌梗死(AMI)临床及预后价值。方法所有患者入院24h内均测定QT离散度[QTd及校正的QTd(QTcd)],出院前24h内再次测定QTd、QTcd。结果各组患者QTd、QTcd比较差异有统计学意义(P<0.05);AMI死亡患者QTcd与存活者比较明显延长,有统计学意义(P>0.05);QT离散度与室性心律失常严重程度呈正相关。结论QTd与QTcd是AMI高危患者临床心电学的敏感指标之一,对AMI患者预测严重心律失常及评价心功能状况、判断预后有重要的临床价值。
Objective To evaluate the clinical and prognostic value of QT dispersion in acute myocardial infarction (AMI). Methods QTd and corrected QTd (QTd) were measured in all patients within 24h after admission. QTd and QTcd were measured again within 24h before discharge. Results QTd and QTcd in each group were significantly different (P <0.05); QTcd in patients with AMI was significantly longer than those in survivors (P> 0.05); QT dispersion and the severity of ventricular arrhythmia Was positively correlated. Conclusions QTd and QTcd are one of the sensitive indexes of clinical electrocardiogram in AMI patients. It is of great clinical value to predict serious arrhythmia and evaluate cardiac function in patients with AMI.