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Performance evaluation of a right atrial automatic capture verification algorithm using two different sensing

Johannes Sperzel1, Stephan Goetze, Charles Kennergren

  • 1Kerckhoff-Klinik GmbH, Kardiologie, Abt. Elektrophysiologie, Bad Nauheim, Germany. J.Sperzel@Kerckhoff-Klinik.de

Pacing and Clinical Electrophysiology : PACE
|May 9, 2009
PubMed
Summary
This summary is machine-generated.

This study shows the RA(Ring)-->Can configuration effectively verifies right atrial (RA) automatic capture verification (ACV) using evoked response sensing. This method offers a reliable approach for pacing threshold measurements in cardiac devices.

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Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Medical Device Technology

Background:

  • The study investigates the performance of an automatic capture verification (ACV) algorithm for right atrial (RA) pacing.
  • It evaluates evoked response sensing using two distinct electrode configurations during unipolar pacing.

Purpose of the Study:

  • To assess the efficacy of a novel RA ACV algorithm.
  • To compare two electrode configurations (RA(Ring)-->Can and RA(Ring)-->Ind) for sensing atrial evoked responses (AER).

Main Methods:

  • RA automatic threshold tests were performed, recording AER signals between RA(Ring) and either the Can electrode or an Indifferent header electrode.
  • The ACV algorithm's performance was evaluated offline, with accurate threshold measurement defined as within 0.2 V of manual measurements.
  • Tests were designed to identify failures related to small AER (< 0.35 mV) or low signal-to-artifact ratio (SAR < 2).

Main Results:

  • Data from 38 patients with RA bipolar leads were analyzed.
  • The RA(Ring)-->Can configuration yielded significantly larger minimum AER amplitudes (1.6+/-0.9 mV) compared to RA(Ring)-->Ind (1.3+/-0.8 mV).
  • The ACV algorithm achieved high success rates: 96.8% for RA(Ring)-->Can and 91.0% for RA(Ring)-->Ind.

Conclusions:

  • The RA(Ring)-->Can AER sensing configuration shows promise for implementing an independent pacing/sensing method for RA ACV.
  • RA bipolar pacing therapy utilizing measured RA unipolar pacing thresholds appears feasible.