Pediatric ECGs: Difference between revisions

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Revision as of 13:46, 25 June 2010

A excellent description of the neonatal electrocardiogram has been made by Schwarz et al.schwarz1schwarz2

Heart Axis

Normal heart axis valuesaha
Age QRS Axis Normal Values Abnormal Values Description
Adult -30° to 90°
<-30°
-30° to -45°
-45° to -90°
90° to 120°
90° to 180°
Left-axis deviation
Moderate left-axis deviation
Marked left-axis deviation
Moderate right-axis deviation
Marked right-axis deviation
8 to 16 years 0° to 120° >120° Right-axis deviation
5 to 8 years 0° to 140° >140°

<0°

Right-axis deviation

Left-axis deviation

1 year to 5 years 5° to 100° >100° Right-axis deviation
1 mo to 1 y 10° to 120° >120°

<10° to -90°

Right-axis deviation

Left-axis deviation

Neonate 30° to 90° >190° to -90°

<30° to <-90°

Extreme right axis deviation

Left axis deviation

Conduction

RBBB: if consistent morphology and if QRS width >90ms in children < 4 years and >100ms in children 4-16 yearsaha LBBB: if consistent morphology and QRS width >90ms in children < 4 years and >100ms in children 4-16 yearsaha

Normal neonatal ECG standards

Normal neonatal ECG standards
Age group Heart rate
(beats . min-1) 		Frontal plane
QRS axisa
(degrees) 		P wave
amplitude
(mm) 		P-R
intervala
(s) 		QRS
durationa
V5 		Q IIIc (mm) QV6c (mm) RV1b (mm) SV1b (mm) R/S V1c RV6b (mm) SV6b (mm) R/S V6c SV1 + RV6c (mm) R + SV4c (mm)
0–1 days 93–154 (123) +59 to +192 (135) 2·8 0·08–0·16 (0·11) 0·02–0·08 (0·05) 5·2 1·7 5–26 0–22·5 9·8 0–11 0–9·8 10 28 52
1–3 days 91–159 (123) +64 to +197 (134) 2·8 0·08–0·14 (0·11) 0·02–0·07 (0·05) 5·2 2·1 5–27 0–21 6 0–12 0–9·5 11 29 52
3–7 days
7–30 days 1–3 months

References

<biblio>

  1. aha pmid=19228822
  2. schwarz1 pmid=12269267
  3. schwarz2 pmid=12739597

</biblio>

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