Intermittent ventricular pre-excitation in the presence of total atrioventricular block
Haertel, L.A.; Moffa, P.J.; Grupi, C.J.; Camargo, P.A.; Pereyra, P.A.; Lima, E.V.
Arquivos Brasileiros de Cardiologia 61(5): 307-310
1993
ISSN/ISBN: 0066-782X PMID: 8147730 Document Number: 421716
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.