Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 326-329 |
| Number of pages | 4 |
| Journal | Journal of Electrocardiology |
| Volume | 44 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 01-05-2011 |
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All Science Journal Classification (ASJC) codes
- Cardiology and Cardiovascular Medicine
Cite this
}
Beat-to-beat QT interval variability in children : Normal and physiologic data. / Kusuki, Hirofumi; Kuriki, Marina; Horio, Kayo; Hosoi, Misa; Matsuura, Hideaki; Fujino, Masayuki; Eryu, Yoshihiko; Miyata, Masafumi; Yasuda, Toshiaki; Yamazaki, Toshio; Nagaoka, Shunji; Hata, Tadayoshi.
In: Journal of Electrocardiology, Vol. 44, No. 3, 01.05.2011, p. 326-329.Research output: Contribution to journal › Article
TY - JOUR
T1 - Beat-to-beat QT interval variability in children
T2 - Normal and physiologic data
AU - Kusuki, Hirofumi
AU - Kuriki, Marina
AU - Horio, Kayo
AU - Hosoi, Misa
AU - Matsuura, Hideaki
AU - Fujino, Masayuki
AU - Eryu, Yoshihiko
AU - Miyata, Masafumi
AU - Yasuda, Toshiaki
AU - Yamazaki, Toshio
AU - Nagaoka, Shunji
AU - Hata, Tadayoshi
PY - 2011/5/1
Y1 - 2011/5/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=79955063147&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79955063147&partnerID=8YFLogxK
U2 - 10.1016/j.jelectrocard.2010.07.016
DO - 10.1016/j.jelectrocard.2010.07.016
M3 - Article
VL - 44
SP - 326
EP - 329
JO - Journal of Electrocardiology
JF - Journal of Electrocardiology
SN - 0022-0736
IS - 3
ER -