In utero, blood is shunted away from the pulmonary vasculature leading to higher pulmonary pressures and a relatively larger and thicker right ventricle. Right axis deviation is thus a normal finding at birth, and usually resolves by 6 months of age.
The presence of ECG features of left ventricular hypertrophy in a paediatric patient should prompt the clinician to look for other ECG and clinical features of hypertrophic cardiomyopathy and investigate as appropriate.
Abnormal T waves: Upright T waves in V1 and V4R in children 3 days to 6 years (provided that T waves are normal elsewhere, i.e. upright in V6). This is evidence alone of significant RVH.
MBBS (UWA) CCPU (RCE, Biliary, DVT, E-FAST, AAA) Adult/Paediatric Emergency Medicine Advanced Trainee in Melbourne, Australia. Special interests in diagnostic and procedural ultrasound, medical education, and ECG interpretation. Editor-in-chief of the LITFL ECG Library. Twitter: @rob_buttner
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