QT离散度预测老年急性心肌梗死患者发生室性心律失常的临床价值分析

Analysis of the Clinical Value of QT Dispersion in Predicting Ventricular Arrhythmia in Elderly Patients with Acute Myocardial Infarction

目的分析QT离散度预测老年急性心肌梗死患者发生室性心律失常的临床价值。方法选取肇庆市第一人民医院2017年5月-2019年4月收治的60例老年急性心肌梗死患者视为实验组,其中合并室性心律失常28例为观察1组,未合并室性心律失常32例观察2组。另选取同期肇庆市第一人民医院接受健康体检的老年体检者30例作为参照,视为对照组。对各组心电图情况进行检查,比较QT离散度、校正QT离散度以及校正QT离散度≥60 ms(31例)和<60 ms(29例)室性心律失常情况,Pearson分析QT离散度与室性心律失常的相关性。结果观察组QT离散度、校正QT离散度高于对照组,观察1组QT离散度、校正QT离散度高于观察2组,差异均有统计学意义(P<0.05)。校正QT离散度≥60 ms室性心律失常发生率为45.16%(14/31),高于校正QT离散度<60 ms的19.34%(6/29),差异有统计学意义(P<0.05)。Pearson相关性分析显示,QT离散度与老年急性急性心肌梗死患者室性心律失常发生率呈正相关(P<0.05)。结论 QT离散度与老年急性心肌梗死患者室性心律失常呈正相关,QT离散度越高,室性心律失常的发生率越高。

Objective To analyze the clinical value of QT dispersion in predicting ventricular arrhythmia in elderly patients with acute myocardial infarction.Methods 60 elderly patients with acute myocardial infarction admitted to the hospital from May,2017 to April, 2019 were selected as the experimental group. Among them, 28 cases with ventricular arrhythmia were observed in group 1, and 32 cases without ventricular arrhythmia were observed in group 2. Another 30 cases of elderly patients who received physical examination in the hospital during the same period were regarded as the control group. ECG of each group was examined,and QT dispersion, corrected QT dispersion, corrected QT dispersion≥60 ms(31 cases) and<60 ms(29 cases) were compared. The correlation between QT dispersion and ventricular arrhythmias was analyzed through pearson.Results The QT dispersion and corrected QT dispersion in the observation group were higher than those in the control group, with statistically significant differences(P<0.05). The incidence of corrected QT dispersion≥60 ms was 45.16%(14/31), which was higher than the 19.34%(6/29) of corrected QT dispersion<60 ms, and the difference was statistically significant(P<0.05). Pearson correlation analysis showed that QT dispersion was positively correlated with the incidence of ventricular arrhythmia in elderly patients with acute myocardial infarction(P<0.05).Conclusion QT dispersion is positively correlated with ventricular arrhythmia in elderly patients with acute myocardial infarction. The higher QT dispersion is, the higher incidence of ventricular arrhythmia is.