Netherlands Heart Journal

, Volume 21, Issue 4, pp 191–195 | Cite as

Incidence and predictors of phantom shocks in implantable cardioverter defibrillator recipients

  • K. Kraaier
  • A. H. Starrenburg
  • R. M. Verheggen
  • J. van der Palen
  • M. F. Scholten
Original Article

Abstract

Background

Implantable cardioverter defibrillators (ICDs) are designed to deliver shocks or antitachycardia pacing (ATP) in the event of ventricular arrhythmias. During follow-up, some ICD recipients experience the sensation of ICD discharge in the absence of an actual discharge (phantom shock). The aim of this study was to evaluate the incidence and predictors of phantom shocks in ICD recipients.

Methods

Medical records of 629 consecutive patients with ischaemic or dilated cardiomyopathy and prior ICD implantation were studied.

Results

With a median follow-up of 35 months, phantom shocks were reported by 5.1 % of ICD recipients (5.7 % in the primary prevention group and 3.7 % for the secondary prevention group; p=NS). In the combined group of primary and secondary prevention, there were no significant predictors of the occurrence of phantom shocks. However, in the primary prevention group, phantom shocks were related to a history of atrial fibrillation (p=0.03) and NYHA class <III (p=0.05). In the secondary prevention group, there were no significant predictors for phantom shocks.

Conclusion

Phantom shocks occur in approximately 5 % of all ICD recipients. In primary prevention patients, a relation with a history of atrial fibrillation and NYHA class <III were significant predictors for the occurrence of phantom shocks. In the secondary prevention patients, no significant predictors were found.

Keywords

Implantable defibrillator Primary prevention Secondary prevention Phantom shock Psychological consequences 

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Copyright information

© Springer Media / Bohn Stafleu van Loghum 2012

Authors and Affiliations

  • K. Kraaier
    • 1
  • A. H. Starrenburg
    • 2
  • R. M. Verheggen
    • 1
  • J. van der Palen
    • 3
    • 4
  • M. F. Scholten
    • 1
  1. 1.Department of Cardiology, Thoraxcenter TwenteMedisch Spectrum TwenteEnschedethe Netherlands
  2. 2.Department of PsychologyMedisch Spectrum TwenteEnschedethe Netherlands
  3. 3.Department of EpidemiologyMedisch Spectrum TwenteEnschedethe Netherlands
  4. 4.Department of Research methodology, Methods and Data AnalysisUniversity of TwenteEnschedethe Netherlands

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