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Related Experiment Videos

Is accurate rate response programming necessary?

N Sulke1, A Dritsas, J Chambers

  • 1Department of Cardiology, Guy's Hospital, London, England.

Pacing and Clinical Electrophysiology : PACE
|August 1, 1990
PubMed
Summary
This summary is machine-generated.

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Appropriate programming of rate-responsive pacemakers improves exercise capacity and well-being. Over-programming, however, leads to poor patient acceptance, highlighting the critical need for accurate pacemaker settings.

Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Medical Devices

Background:

  • Rate-responsive pacemakers enhance exercise capacity compared to fixed-rate devices.
  • Optimizing pacemaker programming is crucial for patient outcomes.

Purpose of the Study:

  • To evaluate the impact of different rate-responsive pacemaker programming strategies on exercise capacity and well-being.
  • To compare single-chamber (VVIR) and dual-chamber (DDDR) pacing modes with varying activity sensor responsiveness.

Main Methods:

  • A double-blind crossover study involving 20 patients with activity-sensing pacemakers (10 VVIR, 10 DDDR).
  • Patients were programmed to absent, hyporesponsive, appropriate, and over-responsive rate settings.
  • Objective assessments included graded treadmill testing and daily activity monitoring; subjective assessments used visual analog scales and questionnaires.

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Main Results:

  • Appropriate programming (VVIR, DDDR) and over-programming (VVIR+, DDDR+) improved exercise capacity compared to absent response (VVI).
  • Patients reported the poorest general well-being with over-responsive settings (DDDR+, VVIR+).
  • Symptoms were minimized with VVIR and DDDR modes, with most patients preferring appropriate programming.

Conclusions:

  • Appropriate programming of rate-responsive pacemakers is essential for optimizing both objective exercise capacity and subjective patient well-being.
  • Over-programming negatively impacts patient experience, underscoring the importance of precise sensor calibration and programming protocols.