title: [Variations in QRS duration and axis with different sites and intervals of right ventricular pacing].
abstract: BACKGROUND
  The aim of this study was to achieve left ventricular resynchronization by means of right ventricular pacing.
  
  
  METHODS
  We studied 12 patients (9 males, 3 females, mean age 61.7 +/- 19.5 years), with syncope, II degree atrioventricular block or ventricular arrhythmias, without intraventricular conduction disturbances. Single and dual site pacing, synchrony or at different delay, was made in the right ventricular, outflow tract from the apex, and midseptal areas.
  
  
  RESULTS
  In all patients we obtained the shortest QRS duration with synchrony or delayed bisite pacing (standard ventricular apex pacing 170 +/- 20 ms; bisite pacing 137 +/- 13 ms).
  
  
  CONCLUSIONS
  Our data demonstrate that appropriate right ventricular pacing can lead to left ventricular resynchronization.
authors.affiliation: U.O. di Elettrofisiologia ed Elettrostimolazione Dipartimento di Cardiologia Azienda Ospedaliera Via Palasciano 81100 Caserta. elettrofisiologia-ce@libero.it
authors.forename: Franco
authors.initials: F
authors.lastname: Mascia
authors.forename: Luciano
authors.initials: L
authors.lastname: Fattore
authors.forename: Miguel
authors.initials: M
authors.lastname: Viscusi
authors.forename: Pasquale
authors.initials: P
authors.lastname: Golino
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Di Donna
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Ricciardiello
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002304:Cardiac Pacing, Artificial / Q000379:methods*; D004562:Electrocardiography; D005260:Female; D006329:Heart Conduction System / Q000473:pathology* / Q000503:physiopathology*; D006352:Heart Ventricles; D006801:Humans; D008297:Male; D008875:Middle Aged