正常成人立体心电图心室复极参数分析

Analysis of the ventricular repolarizing parameters of threedimensional ECG of healthy adults

目的分析正常成人立体心电图心室复极参数范围。方法选择正常成年男女各50例采集立体心电图,并对QRS-T夹角、QRS-T比值、ST段和T环各主要参数进行统计分析。结果正常成年男女空间QRS-T夹角均值分别为(50.6°±33.1°)(95%可信区间为41.2°~60.1°)和(48.2°±28.7°)(95%可信区间为40.1°~56.3°),QRS-T比值均值分别为(3.12±1.51)(95%可信区间为2.69~3.55)和(3.71±2.61)(95%可信区间为2.96~4.45)。男女相比,ST时间[(88.9±24.7)ms比(108.5±13.2)ms,P<0.05]、T环运行时间[(187.2±28.9)ms比(174.9±24.5)ms,P<0.05]和离支时间[(118.3±33.2)比(102.6±33.1),P<0.05],差异均有统计学意义。结论与女性相比,男性T环运行时间和离支时间更长,ST时间更短。

Objective To analyze the ranges of the ventricular repolarizing parameters of three-dimensional ECG in healthy population. Methods To collect three-dimensional ECG of fifty healthy males and fifty healthy females, and contrast the QRS-T angle, the QRS-T ratio the running time, the main parameters of S-T segment and T loops, between males and females. Results In healthy males and females, the spatial QRS-Tangle was(50. 6°±33. 1°)(95% confidence interval was from 41.2 °to 60.1 °) and (48.2 °± 28.7 °) (95%confidence interval was from 40.1 ° to 56.3 ° ),respectively, while the QRS-T ratios were (3.12 ± 1.51) (95% confidence interval was from2.69 to 3.55) and (3.71 ± 2.61) (95% confidence interval was from2.96 to 4.45) , the difference between men and women has no statistically significance. To compare males with females, the S-T segment time(88.9±24.7ms ratio 108.5±13.2ms, P < 0.05),the running time(187.2±28.9ms ratio 174.9±24.5ms, P < 0.05)and the leaving branch''s time(118.3 ±33.2 ratio 102.6±33.1, P < 0.05)of the T loop the has statistically difference. Conclusion Compared with the females, the T-loop running time and the leaving branch''s time longer are greater, the ST segment time is shorter.