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Related Experiment Videos

A new acceleration driven pacemaker: rate modulation versus normal sinus rhythm--comparison during treadmill

A I Soussou1, M G Helmy, R R Guindy

  • 1Italian Hospital Umberto I, Intensive Care Unit, Cairo, Egypt.

Pacing and Clinical Electrophysiology : PACE
|November 1, 1992
PubMed
Summary
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This study evaluated a new acceleration-driven pacemaker (SWING 100) during exercise. The pacemaker showed a rapid rate increase, with response primarily influenced by activity speed rather than grade.

Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Medical Devices

Background:

  • Pacemaker technology aims to mimic physiological heart rate response.
  • Acceleration-driven pacemakers utilize sensors to adapt pacing rates to physical activity.
  • Evaluating the performance of new pacemaker systems is crucial for clinical application.

Purpose of the Study:

  • To assess the pacing rate response of the SWING 100 acceleration-driven pacemaker.
  • To compare the pacemaker's performance against normal sinus rhythm (NSR) during treadmill exercise.
  • To investigate the effect of different rise response curves (RRC) on pacemaker function.

Main Methods:

  • The SWING 100 pacemaker's rate response was tested in six healthy volunteers during Bruce and discontinuous treadmill protocols.

Related Experiment Videos

  • Pacemaker rates were recorded using the VEGA analyzer and compared with simultaneous NSR via a 7-channel ECG.
  • Three different RRC settings (fast, normal, slow) were evaluated for each test.

    • Main Results:

    • The pacemaker exhibited an immediate, rapid rate increase within seconds, followed by a slower rise.
    • Mean correlation between pacing rates and NSR was generally high (0.72-0.86) across tests and RRCs.
    • Pacemaker response was more sensitive to activity speed than to exercise grade, particularly in discontinuous tests.

    Conclusions:

    • The SWING 100 pacemaker demonstrates a functional rate response to physical activity.
    • The speed of the rise to the upper rate is the primary differentiator between programmed RRC settings.
    • Further studies may be needed to fully elucidate performance across diverse patient populations and activity types.