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Electrocardiograms (ECGs) are the graphic representation of body surface potential differences generated by the electrical activity of the heart. Bipolar limb leads, augmentedunipolar limb leads and precordial leads have been used routinely for recording the ECG, which remains an essential part of the cardiac examination, even after the advent of cardiac catheterization, angiocardiography, echocardiography and many other sophisticated diagnostic modalities. | H.C.Lue ECG in the Child and Adolescent Normal Standards and Percent le Charts Blackwell V Futura ECG in the Child and Adolescent NORMAL STANDARDS AND PERCENTILE .
