Pediatric ECGs
Heart Axis
| Age | QRS Axis Normal Values | Abnormal Values | Description |
| Neonate | 30 to 90 | >190 to -90
<30 to <-90 |
Extreme right axis deviation
Left axis deviation |
| Adult | |||
| <-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 |