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Related Experiment Videos

Influence of internal current and pacing current on pacemaker longevity

A Schuchert1, K H Kuck

  • 1Department of Cardiology, University-Hospital Eppendorf, Hamburg, Germany.

Pacing and Clinical Electrophysiology : PACE
|January 1, 1994
PubMed
Summary

Programming VVI pacemakers to lower pulse amplitudes, like 2.5 V, significantly extends battery longevity. The newer Minix pacemaker showed greater longevity improvements compared to the older Pasys model, especially at reduced pulse amplitudes.

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Area of Science:

  • Biomedical Engineering
  • Medical Device Technology

Background:

  • Pacemaker longevity is crucial for patient care and device management.
  • Comparing new and older pacemaker models helps understand technological advancements.
  • Battery current consumption directly impacts pacemaker lifespan.

Purpose of the Study:

  • To evaluate the effect of reduced pulse amplitude on battery current and longevity.
  • To compare a new VVI pacemaker (Minix 8341) with a former model (Pasys 8329).

Main Methods:

  • Telemetric measurement of battery current at various pulse amplitudes and durations.
  • Calculation of pacing current by subtracting internal current from battery current.
  • Projecting pacemaker longevity based on measured currents and programming settings.

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Main Results:

  • The Minix pacemaker exhibited significantly lower battery current due to lower internal current.
  • Programming from 5.0 V to 2.5 V pulse amplitude reduced battery current more effectively in the Minix.
  • Programming to 2.5 V extended projected longevity by 2.3 years for Pasys and 7.1 years for Minix.

Conclusions:

  • Pacemaker longevity can be extended by programming to 2.5 V or lower.
  • This strategy is particularly effective for pacemakers requiring low internal current.