title: Successful ablation of a concealed parahisian accessory pathway using a remote magnetic navigation system following failure by conventional methods.
abstract: OBJECTIVE
  Using conventional catheters, ablation of concealed parahisian accessory pathways may be difficult and high risk for heart block.
  
  
  RESULTS
  We describe the case of a concealed parahisian accessory pathway with three prior attempts to ablate using conventional methods (RF and cryotherapy). Using a remote magnetic navigation system, successful ablation occurred following a single RF lesion (total fluoroscopy time 17 min). In contrast to previous attempts, the patient remained asymptomatic during follow-up (12 months).
  
  
  CONCLUSIONS
  This is the first report of successful remote magnetic catheter ablation of a concealed parahisian AP. Magnetic catheter stability during RF application likely contributed to the success of this procedure and may have minimized the risk of AV block.
authors.affiliation: University of Ottawa Heart Institute, Rm. H350 40 Ruskin St., Ottawa, ON K1Y 4W7, Canada.
authors.forename: Darryl R
authors.initials: DR
authors.lastname: Davis
authors.forename: Anthony S
authors.initials: AS
authors.lastname: Tang
authors.forename: David H
authors.initials: DH
authors.lastname: Birnie
authors.forename: Michael H
authors.initials: MH
authors.lastname: Gollob
mesh_terms: D017115:Catheter Ablation / Q000379:methods*; D017679:Cryotherapy; D005260:Female; D006329:Heart Conduction System / Q000002:abnormalities* / Q000601:surgery*; D006801:Humans; D008280:Magnetics; D008875:Middle Aged; D019233:Retreatment; D012371:Robotics / Q000379:methods*; D017211:Treatment Failure