title: [A new cause of acute transitory auriculoventricular block: Lyme disease].
abstract: A young man developed syncopal complete paroxysmal atrioventricular block (AVB) over a 36 hour period, on a background of 1st degree AVB which persisted for 6 weeks. During the 3rd week, electrophysiological studies showed an isolated prolonged AH interval. This episode followed skin and articular manifestations occurring one month after being bitten by a tick in Corsica. The clinical picture suggested Lyme's disease which was confirmed serologically. This condition transmitted bu Ixodes ricinus, a tick present in country districts, is due to spirochetal infection. It is characterized by a chronic migrating erythema, and may sometimes be complicated by severe AV conduction defects which are always regressive, as in our case.
mesh_terms: D000328:Adult; D004562:Electrocardiography; D006327:Heart Block / Q000175:diagnosis / Q000209:etiology*; D006801:Humans; D008193:Lyme Disease / Q000150:complications*; D008297:Male
vernacular_title: Une nouvelle cause de bloc auriculo-ventriculaire aigu transitoire: la maladie de Lyme.