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Related Experiment Videos

[Activitrax--a pacemaker with a regulated rhythm rate].

Z Sadowski, K Zalas, M Srzednicki

    Kardiologia Polska
    |January 1, 1989
    PubMed
    Summary

    Rate responsive pacemakers, like Activitrax, significantly improved cardiac output during exercise in patients with heart block or sick sinus syndrome compared to fixed-rate pacing.

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    [Is application of electrocardiographic exercise test always usefull in the diagnosis of coronary artery disease? Advantages and limitations of this method].

    Polskie Archiwum Medycyny Wewnetrznej·2002

    Area of Science:

    • Cardiology
    • Biomedical Engineering
    • Electrophysiology

    Context:

    • Patients with complete atrioventricular block and sick sinus syndrome often require pacemaker implantation.
    • Traditional pacemakers provide a fixed heart rate, which may not adequately meet physiological demands during activity.
    • Rate-responsive pacemakers aim to adjust pacing rates based on physiological sensors.

    Purpose:

    • To evaluate the efficacy of the Activitrax rate-responsive pacemaker in patients with atrioventricular block and sick sinus syndrome.
    • To compare cardiac output during exercise using rate-responsive pacing versus on-demand fixed-rate pacing.

    Summary:

    • The study involved 10 patients (7 with complete atrioventricular block, 3 with sick sinus syndrome) who received an Activitrax pacemaker.
    • Treadmill exercise tests were conducted 6 and 12 weeks post-implantation.
    • Rheographically measured cardiac output showed a significant increase with rate-responsive pacing compared to fixed-rate stimulation.

    Impact:

    • Rate-responsive pacing, specifically with the Activitrax device, can enhance hemodynamic performance during exercise in patients with specific bradyarrhythmias.
    • This finding supports the use of activity-sensing pacemakers for improving exercise capacity and quality of life.

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