Association between ventricular repolarization variables and cardiac diastolic function: A cross-sectional study of a healthy Chinese population  

作　　者：Zhi-Dan Li Xiao-Juan Bai Lu-Lu Han Wen Han Xue-Feng Sun Xiang-Mei Chen 

机构地区：[1]Department of Gerontology and Geriatrics,Shengjing Hospital of China Medical University [2]Department of Kidney, General Hospital of Chinese People's Liberation Army

出　　处：《World Journal of Clinical Cases》2019年第8期940-950,共11页世界临床病例杂志

基　　金：Supported by the National Basic Research Program of China,No.973-Program#2007CB507405

摘　　要：BACKGROUND Diastolic electromechanical couple, a well-described phenomenon in symptomatic heart failure, has not been well studied in healthy people. We hypothesized that ventricular repolarization variables, such as the QT interval,Tpeak-to-Tend(Tpe) interval and Tpe/QT ratio, are associated with cardiac diastolic function in the healthy Chinese population.AIM To assess the relationship between ventricular repolarization variables and cardiac diastolic function in apparently healthy Chinese individuals.METHODS This was a community-based cross-sectional study conducted in Shenyang,China. A total of 414 healthy subjects aged 35-91 years were enrolled. All subjects underwent standard 12-lead electrocardiography(ECG) and comprehensive echocardiography. ECG enabled the measurement of QT and Tpe intervals and Tpe/QT ratio. echocardiographic parameters, such as the ratio of mitral early diastolic inflow velocity(E) and late diastolic inflow velocity(A), E-wave deceleration time, left atrial volume(LAV) and LAV index, were measured to assess diastolic function. E/A < 0.75 was considered to indicate reduced diastolic function. ECG and echocardiography results were analyzed separately and in a blinded fashion. Correlation and regression analyses were applied to determine associations.RESULTS Ventricular repolarization variables, such as the QTc interval(393.59 ± 26.74 vs403.86 ± 33.56; P < 0.001), Tpe interval(72.68 ± 12.41 vs 77.26 ± 17.86; P < 0.01),Tpec interval(76.36 ± 13.53 vs 83.32 ± 21.25; P < 0.001) and Tpe/QT ratio(0.19 ±0.03 vs 0.20 ± 0.04; P < 0.01), were significantly different between the normal diastolic function group and the reduced diastolic function group. Significant associations were found between repolarization variables and diastolic function.After adjusting for all other possible confounders, the QTc and Tpe_c intervals were significantly associated with the E/A ratio(P = 0.008; P = 0.010). In men, the QTc interval was associated with abnormal diastolic function, and compared to the third QTBACKGROUND Diastolic electromechanical couple, a well-described phenomenon in symptomatic heart failure, has not been well studied in healthy people. We hypothesized that ventricular repolarization variables, such as the QT interval,Tpeak-to-Tend(Tpe) interval and Tpe/QT ratio, are associated with cardiac diastolic function in the healthy Chinese population.AIM To assess the relationship between ventricular repolarization variables and cardiac diastolic function in apparently healthy Chinese individuals.METHODS This was a community-based cross-sectional study conducted in Shenyang,China. A total of 414 healthy subjects aged 35-91 years were enrolled. All subjects underwent standard 12-lead electrocardiography(ECG) and comprehensive echocardiography. ECG enabled the measurement of QT and Tpe intervals and Tpe/QT ratio. echocardiographic parameters, such as the ratio of mitral early diastolic inflow velocity(E) and late diastolic inflow velocity(A), E-wave deceleration time, left atrial volume(LAV) and LAV index, were measured to assess diastolic function. E/A < 0.75 was considered to indicate reduced diastolic function. ECG and echocardiography results were analyzed separately and in a blinded fashion. Correlation and regression analyses were applied to determine associations.RESULTS Ventricular repolarization variables, such as the QTc interval(393.59 ± 26.74 vs403.86 ± 33.56; P < 0.001), Tpe interval(72.68 ± 12.41 vs 77.26 ± 17.86; P < 0.01),Tpec interval(76.36 ± 13.53 vs 83.32 ± 21.25; P < 0.001) and Tpe/QT ratio(0.19 ±0.03 vs 0.20 ± 0.04; P < 0.01), were significantly different between the normal diastolic function group and the reduced diastolic function group. Significant associations were found between repolarization variables and diastolic function.After adjusting for all other possible confounders, the QTc and Tpe_c intervals were significantly associated with the E/A ratio(P = 0.008; P = 0.010). In men, the QTc interval was associated with abnormal diastolic function, and compared to the third QT

关 键 词：QT INTERVAL Tpeak-to-Tend INTERVAL DIASTOLIC DYSFUNCTION VENTRICULAR REPOLARIZATION ELECTROCARDIOGRAPHY 

分 类 号：R[医药卫生]