心肌梗死患者QTd、Tp-Te和Tp-Te/QT的观察

The observation of QTd,Tp-Te and Tp-Te/QT ratio in patients with myocardial infarction

目的观察心肌梗死后3~6个月患者心电图QTd、Tp-Te和Tp-Te/QT与对照组之间有无差异。方法选取自2011年1月至9月行心电图检查的心梗后3~6个月患者30例,男14例,女16例,平均年龄（51.2±11.94）岁;收集年龄、性别相匹配的对照组30例,男15例,女15例,平均年龄（50.4±9.45）岁,测量各组心电图QTd、Tp-Te间期并计算Tp-Te/QT值。结果心梗组Tp-Te和Tp-Te/QT比值均大于对照组,差异具有统计学意义（心梗组Tp-Te：101.9±14.5ms;Tp-Te/QT：0.287±0.04;对照组Tp-Te：75.7±12.4ms;Tp-Te/QT：0.193±0.03;p〈0.05）;QTd在两组之间无差异（心梗组：40.5±3.9ms;对照组：37.9±3.8ms;p〉0.05）。结论心梗患者Tp-Te,Tp-Te/QT比值增高,可反映跨室壁复极离散度的变化,与心律失常的发生关系密切。

Objective To observe QT dispersion （QTd）, Tpeak-Tend interval （Tp-Te）, Tp-Te/QT ratio from ECG in patients with 3 to 6 months myocardial infarction. Methods Thirty consecutive patients with myocardial infarction （14 males and 16 females; mean age 51.2±11.94 years） and thirty age-and sex-matched controls （15 males and 15 females; mean age：50.4±9.45 years） were included in the study. They underwent standard 12-lead ECG in January to September 2011. The QTd, Tp-Te were manually assessed and measured the ratio of Tp-Te/ QT. Results The value of Tp-Te and Tp-Te/QT ratio were statistically higher than control group （Tp-Te： 101.9± 14.5ms vs. 75.7±12.4ms; Tp-Te/QT： 0.287±0.04 vs. 0.193±0.03. p〈0.05）. The difference of QTd at two groups was no statistically significant （40.5±3.9ms vs. 37.9±3.8ms; p〉0.05）. Conclusions Patients with myocardial in-farction had increased Tp-Te, Tp-Te/QT ratio that can reflect the change of transmural dispersion of repolariza-tion and closely with the occurrence of arrhythmias.