Beat-to-beat QT interval variability in children: normal and physiologic data

被引：14

作者：

Kusuki, Hirofumi ^{[1
,2
]}

Kuriki, Marina ^{[2
]}

Horio, Kayo ^{[2
]}

Hosoi, Misa ^{[3
]}

Matsuura, Hideaki ^{[3
]}

Fujino, Masayuki ^{[4
]}

Eryu, Yoshihiko ^{[4
]}

Miyata, Masafumi ^{[4
]}

Yasuda, Toshiaki ^{[5
]}

Yamazaki, Toshio ^{[4
]}

Nagaoka, Shunji ^{[2
]}

Hata, Tadayoshi ^{[2
,4
]}

机构：

[1] Mie Univ Hosp, Clin Lab, Tsu, Mie, Japan

[2] Fujita Hlth Univ, Grad Sch Hlth Sci, Toyoake, Aichi, Japan

[3] Fujita Hlth Univ Hosp, Clin Lab, Toyoake, Aichi, Japan

[4] Fujita Hlth Univ, Dept Pediat, Toyoake, Aichi, Japan

[5] Aichi Childrens Hlth & Med Ctr, Dept Cardiol, Aichi, Japan

来源：

JOURNAL OF ELECTROCARDIOLOGY | 2011年 / 44卷 / 03期

关键词：

QT variability index (QTVI); Standard growth curve; Standard value; Sex difference; Prepubescent; REPOLARIZATION LABILITY; VENTRICULAR REPOLARIZATION; CARDIOMYOPATHY; AGE;

D O I：

10.1016/j.jelectrocard.2010.07.016

中图分类号：

R5 [内科学];

学科分类号：

1002 ; 100201 ;

摘要：

Background: QT interval variability provides information on ventricular vulnerability. However, QT interval variability in children has not been adequately evaluated. Methods: One hundred seventy-three consecutive nursing infants and children (male-female, 106:67) up to school age with no intrinsic cardiac disease were included in this study, and they were categorized into 6 age-related groups. The QT variability index (QTVI) was calculated based on an electrocardiogram; and age-specific standard values, sex-specific classification, and a standard growth curve covering 0 to 7 years were constructed. Results: The QTVI decreased in an age-dependent manner, reached constant values after school age, and exhibited no sex-specific differences in 6 age-related groups. Conclusions: Based on the age-dependent standardized QTVI values, it is possible to estimate the instability of ventricular repolarization in pediatric patients with better accuracy. (c) 2011 Elsevier Inc. All rights reserved.

引用

页码：326 / 329

页数：4