title: [Intermittent ventricular pre-excitation in the presence of total atrioventricular block].
abstract: An 8 year old child suffering from asthenia and complete atrioventricular block, probably congenital. During the tread-mill test there was a sudden electrocardiogram change to a ventricular preexcitation pattern. Besides this rare association, we emphasize the importance of the autonomic balance over the accessory pathway's electrophysiological properties. The appearance of a latent accessory pathway might be a substitutive mechanism to counterbalance the serious impairment of physiologic atrioventricular conduction.
authors.affiliation: Instituto do Coração do Hospital das Clínicas-FMUSP, Blumenau, SC.
authors.forename: L A
authors.initials: LA
authors.lastname: Haertel
authors.forename: P J
authors.initials: PJ
authors.lastname: Moffa
authors.forename: C J
authors.initials: CJ
authors.lastname: Grupi
authors.forename: P A
authors.initials: PA
authors.lastname: Camargo
authors.forename: P A
authors.initials: PA
authors.lastname: Pereyra
authors.forename: E V
authors.initials: EV
authors.lastname: Lima
mesh_terms: D002648:Child; D004562:Electrocardiography; D005080:Exercise Test; D006327:Heart Block / Q000150:complications* / Q000175:diagnosis; D006801:Humans; D008297:Male; D014927:Wolff-Parkinson-White Syndrome / Q000150:complications* / Q000175:diagnosis
vernacular_title: Pré-excitação ventricular intermitente na presença de bloqueio atrioventricular total.