Pediatric ECGs

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Heart Axis

Normal heart axis values[1]

Age QRS Axis Normal Values Abnormal Values Description
Adult -30° to 90°
<-30°
-30° to -45°
-45° to -90°
90° to 120°
90° to 120°
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 to 5 y 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

References

  1. aha pmid=19228822
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