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Related Experiment Videos

Heart rhythm during permanent cardiac pacing.

O Edhag, M Rosenqvist

    British Heart Journal
    |August 1, 1979
    PubMed
    Summary

    Many patients with pacemakers retain spontaneous heart activity, suggesting suitability for advanced pacing modes. Digitalis use in paced patients increases risks if pacemaker function fails.

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    Efficacy of primary preventive ICD therapy in an unselected population of patients with reduced left ventricular ejection fraction.

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    Area of Science:

    • Cardiology
    • Biomedical Engineering

    Background:

    • Pacemaker therapy is common in patients with heart rhythm disorders.
    • Long-term pacing efficacy and patient outcomes require continuous evaluation.

    Purpose of the Study:

    • To analyze heart rhythm patterns in patients with long-term pacemaker use.
    • To identify predictors of spontaneous heart activity and assess risks associated with digitalis therapy.

    Main Methods:

    • Analysis of electrocardiographic data from 282 patients paced for over 1 year.
    • Categorization of heart rhythm into spontaneous, pacemaker-induced, or mixed patterns.
    • Comparison of outcomes based on pacing indication and medication use (digitalis).

    Main Results:

    • 12% of patients exhibited spontaneous heart activity throughout follow-up.
    • 74% of patients paced for conditions other than sick sinus syndrome showed regular sinus activity.
    • Patients on digitalis had a higher incidence of asystole (32%) during pacemaker replacement compared to non-digitalis users (19%).

    Conclusions:

    • A significant portion of long-term pacemaker patients may benefit from atrial-triggered pacing.
    • Digitalis therapy in pacemaker patients may increase the risk of sudden death if pacemaker function is compromised.

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