title: [Evolutive study of the VCG in the first week of the normal newborn infant (author's transl)].
abstract: The vectorial and morphological variations of the VCG (Frank method) during the first seven days of life of sixteen normal newborn infants were analyzed. A byphasic distribution of the QRS vectors in the horizontal plane was found at birth. Successive observations showed a rising of initial forces of left septal activation and a slight increase of left parietal forces. The T loop variations were more remarkable, being probably correlated with rapid postnatal hemodynamic modifications. After a few days the T loop was oriented posteriorly and to the left, not changing this direction for many year. The P loop did not differ from the adult's in the majority of cases. Sometimes it showed a figure-or-eight rotation in the horizontal plane, probably due, according to the authors, to a different pathway of atrial activation.
mesh_terms: D000367:Age Factors; D006321:Heart / Q000254:growth & development / Q000502:physiology*; D006439:Hemodynamics; D006801:Humans; D007231:Infant, Newborn; D014672:Vectorcardiography
vernacular_title: Studio evolutivo del vettorcardiogramma nella prima settimana di vita del bambino normale