T-wave oversensing and inappropriate shocks: A case report

Komandoor Srivathsan, Luis R. Scott, Gregory T. Altemose

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


A 27-year-old male with congenital long QT syndrome, SCN5A mutation experienced recurrent inappropriate exercise-related implantable cardioverter defibrillator (ICD) shocks. This device showed T-wave oversensing with double, which lead to these device discharges. Dynamic T-wave oversensing was reproducibly provoked at exercise treadmill testing and was confirmed as the mechanism leading to double counting. The insertion of a new pacing and sensing lead with increased R-wave amplitude did not solve the problem. Exchanging the existing ICD generator with one capable of automatic sensitivity control (Biotronik, Lexos DR, Biotronik, Berlin, Germany) completely eliminated T-wave oversensing and inappropriate shocks.

Original languageEnglish (US)
Pages (from-to)552-555
Number of pages4
Issue number5
StatePublished - May 2008


  • Inappropriate shocks
  • Long QT syndrome
  • T-wave oversensing

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)


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