title: Wide QRS complex supraventricular tachycardia with negative precordial concordance.
abstract: The authors describe the case of a 49-year-old man who experienced an episode of palpitations and dizziness. The results of 24-hour Holter monitoring demonstrated an episode of wide QRS complex regular tachycardia. During the electrophysiological study, a wide QRS complex tachycardia with negative precordial concordance was induced. A diagnosis of orthodromic atrioventricular re-entrant tachycardia involving a left lateral accessory pathway with left bundle branch aberration was made. This case represents a rare exception to the rule that negative precordial QRS concordance is diagnostic of ventricular tachycardia.
authors.affiliation: Second Department of Cardiology, Evangelismos General Hospital of Athens, Athens, Greece. lukepappas@hotmail.com
authors.forename: Loukas K
authors.initials: LK
authors.lastname: Pappas
authors.forename: Michalis
authors.initials: M
authors.lastname: Efremidis
authors.forename: Konstantinos P
authors.initials: KP
authors.lastname: Letsas
authors.forename: Gerasimos D
authors.initials: GD
authors.lastname: Gavrielatos
authors.forename: Ioannis P
authors.initials: IP
authors.lastname: Alexanian
authors.forename: Antonios
authors.initials: A
authors.lastname: Sideris
authors.forename: Fotios
authors.initials: F
authors.lastname: Kardaras
mesh_terms: D017115:Catheter Ablation; D004562:Electrocardiography; D015716:Electrocardiography, Ambulatory; D022062:Electrophysiologic Techniques, Cardiac; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D013617:Tachycardia, Supraventricular / Q000175:diagnosis* / Q000503:physiopathology* / Q000601:surgery