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

Hirofumi Kusuki, Marina Kuriki, Kayo Horio, Misa Hosoi, Hideaki Matsuura, Masayuki Fujino, Yoshihiko Eryu, Masafumi Miyata, Toshiaki Yasuda, Toshio Yamazaki, Shunji Nagaoka, Tadayoshi Hata

Research output: Contribution to journalArticle

10 Citations (Scopus)

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 languageEnglish
Pages (from-to)326-329
Number of pages4
JournalJournal of Electrocardiology
Volume44
Issue number3
DOIs
Publication statusPublished - 01-05-2011

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Age Groups
Sex Characteristics
Heart Diseases
Electrocardiography
Nursing
Pediatrics
Growth

All Science Journal Classification (ASJC) codes

  • Cardiology and Cardiovascular Medicine

Cite this

Kusuki, Hirofumi ; Kuriki, Marina ; Horio, Kayo ; Hosoi, Misa ; Matsuura, Hideaki ; Fujino, Masayuki ; Eryu, Yoshihiko ; Miyata, Masafumi ; Yasuda, Toshiaki ; Yamazaki, Toshio ; Nagaoka, Shunji ; Hata, Tadayoshi. / Beat-to-beat QT interval variability in children : Normal and physiologic data. In: Journal of Electrocardiology. 2011 ; Vol. 44, No. 3. pp. 326-329.
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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.",
author = "Hirofumi Kusuki and Marina Kuriki and Kayo Horio and Misa Hosoi and Hideaki Matsuura and Masayuki Fujino and Yoshihiko Eryu and Masafumi Miyata and Toshiaki Yasuda and Toshio Yamazaki and Shunji Nagaoka and Tadayoshi Hata",
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Kusuki, H, Kuriki, M, Horio, K, Hosoi, M, Matsuura, H, Fujino, M, Eryu, Y, Miyata, M, Yasuda, T, Yamazaki, T, Nagaoka, S & Hata, T 2011, 'Beat-to-beat QT interval variability in children: Normal and physiologic data', Journal of Electrocardiology, vol. 44, no. 3, pp. 326-329. https://doi.org/10.1016/j.jelectrocard.2010.07.016

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 journalArticle

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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.

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