Key result
Age and heart rate are significantly associated with electrocardiographic PR interval variations in children.
Observational (n=506)
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The value of the P-R interval in the study and evaluation of treatment of rheumatic carditis, a disease predominantly of the younger ages, has prompted a re-examination of the normal P-R standards for infants and children. This study reports these data as obtained from 506 normal infants and children. The data reveal that both age and heart rate exert a significant influence on the P-R interval. The minimum, average, and maximum values are given as related to different ages and different heart rates.
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Alimurung et al. (1956) conducted an observational in Normal infants and children (reference standards for rheumatic carditis) (n=506). Age and heart rate was evaluated on P-R interval (minimum, average, and maximum values). Age and heart rate both exerted a significant influence on the electrocardiographic P-R interval in a study of 506 normal infants and children.
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