[New presentation of frontal plane derivations in the electrocardiogram].
D006332:Cardiomegaly / Q000175:diagnosis*; D004562:Electrocardiography; D006327:Heart Block / Q000175:diagnosis*; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000175:diagnosis*
Nova apresentacão das derivações do plano frontal no eletrocardiograma.