Prediction of normal QT intervals in children.
J Electrocardiol
; 31 Suppl: 121-5, 1998.
Article
em En
| MEDLINE
| ID: mdl-9988015
ABSTRACT
Measuring QT intervals in individual children is of great importance, particularly in view of increasing evidence linking long QT syndrome to subsequent risk for sudden death. Three hundred seventy-three healthy subjects, 185 women and 188 men, aged 5.2 to 16.5 years, were investigated with a 12-lead-standard electrocardiogram (ECG). Values for predicted QTp50 and QTp95 (percentiles) were calculated by using the cycle length (RR interval [RRI]) and the measured QT interval. We used multiple regression analysis to test the influence of possible important variables and the resulting data were used to generate tables. Additionally, predicted QTp values were compared to QTc values after Bazett's correction. RRI, body height, age, and sex turned out to influence the QTp values most. For clinical use, data are presented in tabular form by RRI and age for both genders. The tables are of great clinical value in predicting the upper limits of normal QTp95 for individual children. Bazett's correction tends to underestimate the values found in our data when heart rate increases.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Síndrome do QT Longo
/
Eletrocardiografia
Tipo de estudo:
Observational_studies
/
Prognostic_studies
/
Risk_factors_studies
Limite:
Adolescent
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Child
/
Child, preschool
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
J Electrocardiol
Ano de publicação:
1998
Tipo de documento:
Article
País de afiliação:
Alemanha