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Prevalence of arrhythmias and conduction disturbances in large population-based samples of children

Published online by Cambridge University Press:  20 January 2005

Koichiro Niwa ,
Naomi Warita ,
Yuko Sunami ,
Akimitsu Shimura ,
Shigeru Tateno  and
Katsuo Sugita
Koichiro Niwa
Affiliation:
Department of Pediatrics, Chiba Cardiovascular Center, Division of Medicine, Faculty of Education, Chiba University and Chiba Foundation for Health Promotion and Disease Prevention, Chiba, Japan
Naomi Warita
Affiliation:
Department of Pediatrics, Chiba Cardiovascular Center, Division of Medicine, Faculty of Education, Chiba University and Chiba Foundation for Health Promotion and Disease Prevention, Chiba, Japan
Yuko Sunami
Affiliation:
Department of Pediatrics, Chiba Cardiovascular Center, Division of Medicine, Faculty of Education, Chiba University and Chiba Foundation for Health Promotion and Disease Prevention, Chiba, Japan
Akimitsu Shimura
Affiliation:
Department of Pediatrics, Chiba Cardiovascular Center, Division of Medicine, Faculty of Education, Chiba University and Chiba Foundation for Health Promotion and Disease Prevention, Chiba, Japan
Shigeru Tateno
Affiliation:
Department of Pediatrics, Chiba Cardiovascular Center, Division of Medicine, Faculty of Education, Chiba University and Chiba Foundation for Health Promotion and Disease Prevention, Chiba, Japan
Katsuo Sugita
Affiliation:
Department of Pediatrics, Chiba Cardiovascular Center, Division of Medicine, Faculty of Education, Chiba University and Chiba Foundation for Health Promotion and Disease Prevention, Chiba, Japan
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Abstract

The aim of our study is to provide data on the prevalence of disturbances of rhythm in the general population of children. Accurate estimates of true prevalence of such disturbances of rhythm from large samples are mandatory if we are to interpret properly electrocardiographic abnormalities. We analysed prevalence of disturbances of rhythm in a population of 152,322, comprised of 71,855 elementary school students, 36,692 males and 35,163 females, aged from 5 to 6 years, and 80,467 students of junior high school, 41,842 males and 38,625 females, aged from 12 to 13 years. We analysed the prevalence of premature atrial and ventricular contractions, first, second and third degree atrioventricular block, incomplete and complete right bundle branch block, Wolff-Parkinson-White syndrome, and prolongation of the QT interval. The prevalence of disturbances of rhythm in total rose with age, being found in 1.25% of elementary school students and 2.32% of junior high school students, and was higher in males than females, at 2.00% as opposed to 1.38%, both values being statistically significant at a level of less than 0.0001. Prevalences of all types of rhythmic disturbances were higher in junior high school students than elementary school students (p < 0.0001). Premature atrial and ventricular contractions and prolongation of the QT interval were higher in female than male students, at percentages of 0.089, 0.497, and 0.02 for males, and 0.123, 0.534 and 0.027 in females (p < 0.0001). In contrast, incomplete and complete right bundle branch blocks were higher in males than females, at 0.983% and 0.083% in males versus 0.410% and 0.161% in females (p < 0.0001). Disturbances of rhythm increased with age, and conduction disturbances were higher in male students than female, although premature atrial and ventricular contractions and prolongation of the QT interval were more frequent in female. These data may be useful for future comparative studies of disturbance of rhythm in children.

Keywords

Wolff-Parkinson-Whitepremature atrial contractionpremature ventricular contractionatrioventricular blockright bundle branch blockQT prolongation
Type
Original Article
Information
Cardiology in the Young , Volume 14 , Issue 1 , February 2004 , pp. 68 - 74
Copyright
© 2004 Cambridge University Press

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