ABSTRACT
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.
ABSTRACT
Objective To compare the relativity between Tp-Te interval,Tp-Te /QT ratio with heart rate(HR)and explore their clinical significance retrospectively.Methods 200 normal individuals' ECG were randomly selected and the Tp-Te interval and Tp-Te/QT ratio were measured in precordial lead V6 retrospectively.The relativity between Tp-Te interval and Heart Rate,Tp-Te/QT ratio and Heart Rate were calculated retrospectively.Results The Tp-Te interval was about(83.17?12.64)ms in precordial lead V6 of normal individuals.The Tp-Te interval decreased linearly with the increase in HR with the range of Tp-Te interval being 56 to 114 milliseconds(Pearson's correlation coefficient r was-0.239,P=0.007 0.01).Conclusion There is an inverse correlation between Tp-Te interva and HR while no correlation between Tp-Te/QT ratio and HR.