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Related Experiment Videos

Idiosyncratic pacing with a commercial pacing system analyzer

S Zweibel1, S Goel, E Calderon

  • 1Pacemaker Center, Montefiore Medical Center, Bronx, New York 10467, USA.

Pacing and Clinical Electrophysiology : PACE
|February 10, 1998
PubMed
Summary

High output AAI pacing can cause unexpected ventricular capture with specific Medtronic pacing analyzer configurations. Physicians must recognize this anomaly to prevent misinterpretations during pacemaker testing.

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Area of Science:

  • Cardiovascular Electrophysiology
  • Medical Device Technology

Background:

  • Medtronic AV Pacing System Analyzers (models 5311 and 5311B) are used for pacemaker testing.
  • AAI pacing is a mode where the atrium paces and senses, with the ventricle inhibited.

Purpose of the Study:

  • To report an idiosyncratic response observed with Medtronic AV Pacing System Analyzers during high output AAI pacing.
  • To alert implanting physicians to a potential artifact causing false ventricular capture.

Main Methods:

  • Utilized Medtronic AV Pacing System Analyzers (models 5311 unipolar and 5311B bipolar).
  • Performed high output AAI pacing with specific cable and adaptor configurations (unipolar analyzer with bipolar cables, bipolar analyzer with unipolar cables and 2734 adaptor).
  • Observed pacing response with displaced patient ground connection.

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Main Results:

  • Ventricular capture was observed during high output AAI pacing when using the bipolar analyzer with unipolar cables and a 2734 adaptor, with the ground displaced.
  • Ventricular capture was also noted when using the unipolar analyzer with bipolar cables during high output AAI pacing.

Conclusions:

  • Specific configurations of Medtronic AV Pacing System Analyzers can lead to artifactual ventricular capture during high output AAI pacing.
  • Physicians must be aware of this phenomenon to avoid misinterpreting pacing results and drawing false conclusions about device function or patient condition.