Oversensing of transthoracic excitation stimuli in contemporary pacemakers

James D. Ryan, Nathan D. Tempel, Dean D. Engle, David L. Hayes, Yong Mei Cha, Samuel J. Asirvatham

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Background: Transthoracic impedance measurements (TIM) is primarily used for minute ventilation rate adaptive sensors in pacemakers. With elevated impedance, the TIM electrical signal itself is oversensed, causing device malfunction. Objective: We report an increased incidence of TIM oversensing. Method: Retrospective chart review. We review existing records of 18 patients who have demonstrated device malfunction with TIM oversensing. Results: We have found a 1.8% incidence of TIM-related oversensing in our patient population of 959 patients with contemporary Boston Scientific (Marlborough, MA, USA) pacemakers and cardiac resynchronization therapy pacemakers. One patient experienced a syncopal episode. Conclusion: Oversensing with pacing inhibition is apparent with the potential of adverse effects to patients.

Original languageEnglish (US)
Pages (from-to)161-166
Number of pages6
JournalPACE - Pacing and Clinical Electrophysiology
Issue number2
StatePublished - Feb 2018


  • MV Chop
  • minute ventilation
  • oversensing
  • pacemaker
  • pacemaker complication
  • rate-adaptive pacemaker
  • transthoracic impedance measurement

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine


Dive into the research topics of 'Oversensing of transthoracic excitation stimuli in contemporary pacemakers'. Together they form a unique fingerprint.

Cite this