Normal values of signal-averaged electrocardiographic parameters and QT dispersion in infants and children

Ventricular late potentials, and dispersion of the QT interval, are markers for risk of ventricular arrhythmias. Normal values for these parameters are well established in adults, but may not apply for children. This study has investigated the age dependency of signal averaged electrocardiographic p...

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Bibliographic Details
Published in:Cardiology in the young 1999-11, Vol.9 (6), p.556-561
Main Authors: Vialle, Emmanuelle, Albalkhi, Rim, Zimmerman, Marc, Friedli, Béat
Format: Article
Language:English
Subjects:
Action Potentials
Adolescent
Age Factors
arrhythmias in the young
Child
Child, Preschool
Electrocardiography
Female
Heart Conduction System - physiopathology
Humans
Infant
Infant, Newborn
Male
Original Articles
QT dispersion
Reference Values
Signal Processing, Computer-Assisted
signal-averaged electrocardiogram
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Summary:Ventricular late potentials, and dispersion of the QT interval, are markers for risk of ventricular arrhythmias. Normal values for these parameters are well established in adults, but may not apply for children. This study has investigated the age dependency of signal averaged electrocardiographic parameters and QT dispersion in 111 normal children aged from 5 days to 16 years. The results indicate that parameters change with age: duration of filtered QRS and low amplitude (< 40 μV) terminal signal increase with age, especially in the younger patients. Filtered QRS is 88.9 ± 7.87 ms in infants, and increases to 108.7 ± 8.51 in teenagers (p
ISSN:1047-9511
1467-1107
DOI:10.1017/S1047951100005588