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Normal pediatric EKG's change over time as the child grows older. Starting at birth, the EKG will display findings consistent with the fact that the neonate has had a larger right ventricle. Additionally, heart rates are faster and the intervals tend to be shorter. The below information is divided by rough age (the EKG findings over time are not precise).
Birth -3,4 Years
Birth -3,4 Years
Common findings include:
right axis deviation
dominant R wave in V1
RSR' pattern in V1
T wave inversions in V1-V3 (although may be upright in the first week of life)
Q waves in the inferior and precordial leads
HR>100bpm
marked sinus arrhythmia (higher vagal tone)
short PR (<120ms) and QRS (<80ms)
slightly long QTc (<490ms)
slightly tall P waves
3,4-8 Years
3,4-8 Years
By this time, most of the EKG findings will become similar to those of adults. However, the anterior (V1-V3) T wave inversions tend to remain and are still normal at this time.
8-Adult
8-Adult
Most of the EKG's in this age group will be similar to those of adults. However, some have 'persistent juvenile T waves'. This can last into adolescence or even early adulthood.
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