title: [AV reciprocating tachycardia with intermittent bundle branch block in latent Wolff-Parkinson-White syndrome].
abstract: This report deals with a patient with concealed Wolff-Parkinson-White syndrome in whom both narrow and wide QRS tachycardias were observed. The simultaneous occurrence of various QRS morphology during supraventricular tachycardia results in a challenging diagnostic ECG problem. The cycle length during tachycardia with left bundle branch block was longer than the cycle length during narrow QRS supraventricular tachycardia and with functional right bundle-branch block. Electrophysiologic studies revealed fixed V-A conduction time and increased V-A conduction during tachycardia with left bundle branch block. These studies suggested the presence of a concealed left-sided anomalous pathway. Differentiation between intra- and extranodal re-entry and therapeutic modalities are also discussed.
authors.affiliation: Allami Kórház, Balatonfüred.
authors.forename: G
authors.initials: G
authors.lastname: Veress
mesh_terms: D000319:Adrenergic beta-Antagonists / Q000627:therapeutic use; D000328:Adult; D002037:Bundle-Branch Block / Q000188:drug therapy / Q000209:etiology*; D004071:Digitalis Glycosides / Q000627:therapeutic use; D004562:Electrocardiography; D006801:Humans; D008297:Male; D013611:Tachycardia, Atrioventricular Nodal Reentry / Q000175:diagnosis* / Q000188:drug therapy / Q000503:physiopathology; D013617:Tachycardia, Supraventricular / Q000175:diagnosis* / Q000188:drug therapy / Q000503:physiopathology; D014700:Verapamil / Q000627:therapeutic use; D014927:Wolff-Parkinson-White Syndrome / Q000150:complications* / Q000175:diagnosis / Q000503:physiopathology
chemical_list: D000319:Adrenergic beta-Antagonists; D004071:Digitalis Glycosides; D014700:Verapamil
vernacular_title: Intermittáló szárblokkal járó A-V reciprok tachycardia rejtett Wolff-Parkinson-White-syndromában.