title: Clinical value of routine predischarge testing after ICD-implantation.
abstract: OBJECTIVE
  After implantation of a cardioverter/defibrillator (ICD) predischarge testing is often performed to ensure appropriate therapy function. Nevertheless there is no proven evidence for the necessity of this examination. In this retrospective single-centre analysis we investigated the clinical value of routine predischarge testing.
  
  
  RESULTS
  Predischarge testing was performed in 161 patients 6+/-2 days after primary implantation of an ICD. There were no complications related to ICD-testing. In 17 of 161 patients (11%) there was at least one pathological finding. In 4 of 17 patients we observed a defibrillation energy requirement (DER) with a safety margin of less than 10J. In two of these patients an early lead repositioning was undertaken and in two patients reversal of the shock polarity was used to achieve an adequate DER. In 13 of 17 patients we detected a distinct deviation of pacing thresholds or R-wave sensing amplitudes. In two of these patients an early electrode repositioning was performed because of lead displacement. In the remaining 11 patients we found an adequate DER at first, whereas in two patients a further lead repositioning was still necessary during follow-up. In 144 of 161 patients (89%) predischarge testing was without pathological findings. None of these patients needed revision of the ICD-lead during a mean follow-up of 24+/-13 months.
  
  
  CONCLUSIONS
  Abnormal measurements during predischarge testing are not rare findings in ICD-recipients. Noninvasive methods cannot rule out inadequate defibrillation function. A normal predischarge test seems to be a reliable predictor for a stable electrode function during the first years of follow-up.
authors.affiliation: Department of Internal Medicine III, University of Saarland, Homburg, Germany. buob@med-in.uni-saarland.de
authors.forename: Axel
authors.initials: A
authors.lastname: Buob
authors.forename: Stephanos
authors.initials: S
authors.lastname: Siaplaouras
authors.forename: Dietmar
authors.initials: D
authors.lastname: Tscholl
authors.forename: Hans-Joachim
authors.initials: HJ
authors.lastname: Schäfers
authors.forename: Michael
authors.initials: M
authors.lastname: Böhm
authors.forename: Jens
authors.initials: J
authors.lastname: Jung
mesh_terms: D017147:Defibrillators, Implantable / Q000592:standards; D022062:Electrophysiologic Techniques, Cardiac; D004868:Equipment Failure; D005260:Female; D006801:Humans; D008297:Male; D008422:Materials Testing; D008875:Middle Aged; D010351:Patient Discharge; D012189:Retrospective Studies