[Precordial mapping of R, S and Q waves in healthy children and in those with heart defects and cardiomyopathies].

Precordial maps of R, S and Q waves were performed in 43 children with congenital and acquired cardiac defects, with cardiomyopathies and also in 55 healthy children. Two subgroups with the left and right ventricular hypertrophies were separated basing on a standard electrocardiogram. Multilead electrocardiogram (M60--ecg) was recorded from 60 points of a chest wall. Obtained data indicate that a multilead electrocardiogram is useful for ventricular hypertrophy estimation in cardiac defects and cardiomyopathies. Of analyzed R, S and Q waves R wave is essentially important. Different localization and extent of a region of large R wave amplitudes was observed in children with cardiac defects and cardiomyopathies in comparison with healthy persons. Accessory precordial points for R wave registration (besides standard ones) with statistically significant larger R wave amplitude than in healthy children are: A9, A10, B9, B10 for left ventricular hypertrophy assessment and A1, A5, B2, C3, C4, C5, D3, D5, E3, E4, E5, F4 for right ventricular hypertrophy estimation.