正常人Tp-Te间期和Tp-Te/QT比率的研究

Study on Tp-Te/QT Ratio and Tp-Te Interval in Healthy People.

目的测定正常人标准心电图Tp-Te间期和Tp-Te/QT比率并探讨其临床意义。方法随机抽取100例正常人标准心电图,分别测量12个导联的Q-T间期、Q-Tp间期,按(Q-T间期)-(Q-Tp间期)的差值计算Tp-Te间期,按Tp-Te间期/Q-T间期计算其比率,并比较12个导联的测定值。结果 (1)Tp-Te/QT比率和Tp-Te间期均为V2最长(分别为0.24±0.04,93.20±16.07ms),avL最短(分别为0.16±0.03,58.06±13.70ms)。(2)Tp-Te间期在Ⅱ、Ⅲ、avR、V2～V6导联男性比女性长(P<0.05);Tp-Te/QT比率在Ⅱ、Ⅲ、avR、avF、V2～V6导联也是男性比女性长(P<0.05)。(3)全体V2导联Tp-Te间期和Tp-Te/QT比率的95%可信区间分别为(90.01,96.39)(ms)和(0.23,0.25)(ms)。男女V2导联Tp-Te间期的95%可信区间分别为(93.67,103.07)(ms)和(85.13,93.46)(ms)。男女V2导联Tp-Te/QT比率的95%可信区间分别为(0.24,0.26)(ms)和(0.21,0.24)(ms)。结论提供正常人Tp-Te间期值和Tp-Te/QT比率可供临床参考。

Objective To investigate Tpeak - Tend interval and Tpeak - Tend/Q - T interval ratio in healthy people. Methods Q - T interval and Q - Tpeak interval （ time interval from QRS - wave starting to T - wave peak） were measured on electrocardiogram in 100 healthy people, rectrospectively. Then, Tpeak - Tend was calculated by Q - T interval substrating Q - T peak, and T peak - Tend/Q - T interval ratio was calculated. Results T peak - T end/Q - T ratio and T peak - T end interval were greatest in lead V2 （0.24 ± 0.04, 93.20 ± 16.07 ） （ms） and smallest in lead avL （ 0.16 ± 0.03,58.06± 13.70） （ms）. Tpeak - Tend interval in Ⅱ , Ⅲ , avR, V2 ～V6 were significantly greater in male than those in female. Tpeak - Tend/Q - T ratio in Ⅱ , Ⅲ , avR, avF,V2 ～ V6 were significantly greater in male than those in female. Total 95% confidence interval of Tpeak - Tend interval and Tpeak - Tend /Q - T ratio in lead V2 were （90.01 , 96.39） （ms） and （0.23, 0.25 ） , respectively. 95% confidence interval of Tpeak - Tend interval of Male and female subjects in lead V2 were （93.67,103.07） （ms） and （85.13,93.46） （ms） , respectively. 95% confidence interval of Tpeak - Tend interval of Male and female subjects in lead V2 were（0.24,0.26） and （0.21,0.24） , respectively. Conclusion Our study provides values of T peak -T end interval and T peak -T end/Q -T ratio in healthy people.