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Related Experiment Videos

Cross-talk in bipolar pacemakers.

W J Combs1, D W Reynolds, A D Sharma

  • 1Medtronic, Inc., Minneapolis, Minnesota.

Pacing and Clinical Electrophysiology : PACE
|October 1, 1989
PubMed
Summary
This summary is machine-generated.

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High pacing rates in dual chamber pacemakers can cause cross-talk, where signals interfere. Specific lead types and pacing rates influence this interaction, impacting pacemaker sensing accuracy.

Area of Science:

  • Biomedical Engineering
  • Cardiovascular Electrophysiology
  • Medical Device Technology

Background:

  • Sensor-driven dual chamber pacemakers necessitate understanding high-rate pacing interactions.
  • Pacemaker and lead behavior at elevated pacing rates can lead to signal cross-talk.

Purpose of the Study:

  • To investigate pacemaker and lead interactions affecting cross-talk during high-rate atrial and ventricular pacing.
  • To determine the mechanisms and incidence of cross-talk in dual chamber pacing systems.

Main Methods:

  • Phase one utilized a canine model with complete heart block to study cross-talk mechanisms using various lead types at increasing pacing rates.
  • Ventricular sense amplifier output was monitored in response to dual chamber pacing.
  • Phase two assessed cross-talk incidence in patients with implantable dual chamber bipolar pacemakers at different pacing rates.

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Main Results:

  • Ventricular sense amplifier signals significantly increased with pacing rates from 100 to 160 ppm in dogs.
  • Specific lead types (smooth platinum-iridium and platinized) showed statistically significant differences in signal output at higher rates.
  • Clinical trials revealed a low incidence of cross-talk in patients, observed at 110 ppm and 130 ppm but not at higher rates.

Conclusions:

  • High pacing rates can generate sufficient signal interference to cause unintended ventricular sensing events.
  • Lead material and pacing rate are critical factors influencing cross-talk in dual chamber pacing.
  • While cross-talk can occur, its incidence in patients at tested high rates appears to be low.