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Normal Values for the Childhood Signal‐Averaged ECG
Author(s) -
DAVIS ANDREW M.,
McCRINDLE BRIAN W.,
HAMILTON ROBERT M.,
MOORECOLEMAN PAMELA,
GOW ROBERT M.
Publication year - 1996
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1111/j.1540-8159.1996.tb03361.x
Subject(s) - medicine , signal averaged electrocardiogram , qrs complex , body surface area , linear regression , cardiology , demography , statistics , mathematics , sociology
To obtain normative data for the childhood signal‐averaged ECG (SAECG), we obtained SAECGs in 155 volunteers, aged 5–15 years, using Frank leads and a Fourier transform filter. Unfiltered QRS duration (QRSDU) and filtered QRS duration (QRSDF) were significantly longer in males, and the root mean square of the terminal 40 ms (RMS40) was significantly higher in females. There were no gender differences in the duration of high frequency low amplitude signals < 40 μV (DHFLA). All SAECG variables were significantly related to body surface area (BSA), Regression models were established for SAECG variables. For males, the predicted mean + 1.96 standard deviations (SD) for QRSDF (97.5th centile) ranged from 114 ms at BSA 0.70 m 2 to 123 ms at 1.90 m 2 . For females, the predicted mean + 1.96 SD for QRSDF ranged from 110 ms at BSA 0.70 m 2 to 119 ms at 1.90 m 2 . For males and females, the predicted mean + 1.96 SD for DHFLA ranged from 34 ms at 0.70 m 2 to 38 ms at 1.90 m 2 . For males, the predicted mean −1.96 SD (2.5th centile) for RMS40 (based on natural logarithm model) ranged from 30 μV at 0.70 m 2 to 15 μV at 1.90 m 2 . For females, the predicted mean −1.96 SD for RMS40 ranged from 42 μV 0.70 m 2 to 20 μV at 1.90 m 2 . In children 5–15 years of age, both gender and BSA need to be taken into account when interpreting the SAECG.