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Related Experiment Videos

Atrial capture detection with endocardial electrodes.

A R Livingston1, F J Callaghan, C L Byrd

  • 1Telectronics and Cordis Pacing Systems, Miami, FL.

Pacing and Clinical Electrophysiology : PACE
|November 1, 1988
PubMed
Summary
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A novel evoked response detection method, previously used in the ventricle, proved simple and reliable for atrial monitoring during pacemaker implantation. Automatic atrial threshold tracking was found to be feasible in patients.

Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Electrophysiology

Background:

  • Pacemaker implantation requires accurate assessment of atrial capture.
  • Poststimulus polarization can hinder evoked response detection.
  • Previous methods for ventricular evoked response detection show promise.

Purpose of the Study:

  • To evaluate a new evoked response detection method in the atrium during pacemaker implantation.
  • To assess the feasibility of automatic atrial threshold tracking.

Main Methods:

  • Studied a new evoked response detection method in 16 patients undergoing routine pacemaker implantation.
  • Utilized an experimental threshold-tracking pacemaker in six patients to verify atrial capture and generate strength-duration curves.

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Main Results:

  • The atrial evoked response was readily detectable in all patients.
  • Excellent recovery from poststimulus polarization facilitated detection.
  • Automatic atrial threshold tracking was successfully demonstrated.

Conclusions:

  • The studied pacing technique is simple and reliable for atrial evoked response detection.
  • Automatic atrial threshold tracking is a feasible method for pacemaker implantation.