Left ventricular hypertrophy amplifies the QT, and Tp-e intervals and the Tp-e/QT ratio of left chest ECG

摘要

Objective:To evaluate the changes in Tp-e interval(an interval from the peak to the end of the T wave), QT interval and Tp-e/QT ratio of the body surface ECG in patients with left ventricular hypertrophy(LVH). Methods:The Tp-e interval and QT interval were measured on body surface ECGs in 42 patients without either hypertension or LVH(control group),41 patients having hypertension but not LVH(non-LVH group),and 38 patients with both hypertension and LVH(LVH group).Results:The mean corrected QT(QTc)interval, and mean corrected Tp-e[T(p-e)c]interval were significantly longer in the LVH group(0.430±0.021s vs. 0.409±0.019s,p<0.01;0.098±0.013s vs.0.088±0.011s,respectively)than those in the control group.The Tp-e/QT ratio was also amplified in LVH group(0.232±0.028 vs.0.218±0.027)(p<0.05).Conclusion:LVH increased the QT interval,Tp-e interval and Tp-e/QT ratio of the body surface ECG.