title: Identifying non-inducible ventricular tachycardia origin utilizing defibrillator electrograms.
abstract: BACKGROUND
  Developing an ablation strategy when the clinical arrhythmia cannot be induced is a challenge.
  
  
  RESULTS
  A 72-year-old man is transferred to our facility for ventricular tachycardia (VT) storm. Endocardial and epicardial voltage mapping was normal and program stimulation failed to induce any arrhythmias. Implantable cardioverter-defibrillators (ICD) electrograms (EGMs) were recorded while pacing and compared to the stored clinical events. Ablation lesions were delivered across a narrow area of matching ICD EGM pace maps. The patient has remained arrhythmia free for 11 months.
  
  
  CONCLUSIONS
  ICD EGMs may be useful in facilitating successful VT ablation when the clinical arrhythmia cannot be induced in the EP lab.
authors.affiliation: Cardiac Electrophysiology Program, Division of Cardiovascular Medicine, Hospital of the University of Pennsylvania, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA.
authors.forename: Cory M
authors.initials: CM
authors.lastname: Tschabrunn
authors.forename: Elad
authors.initials: E
authors.lastname: Anter
authors.forename: Francis E
authors.initials: FE
authors.lastname: Marchlinski
mesh_terms: D000368:Aged; D018780:Body Surface Potential Mapping / Q000379:methods*; D017147:Defibrillators, Implantable; D003936:Diagnosis, Computer-Assisted / Q000379:methods; D015716:Electrocardiography, Ambulatory / Q000295:instrumentation* / Q000379:methods*; D006801:Humans; D008297:Male; D017180:Tachycardia, Ventricular / Q000175:diagnosis* / Q000517:prevention & control*; D013813:Therapy, Computer-Assisted / Q000379:methods*; D016896:Treatment Outcome