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Bipolar versus unipolar issues in DDD pacing.

R G Baker, E N Falkenberg

    Pacing and Clinical Electrophysiology : PACE
    |November 1, 1984
    PubMed
    Summary
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    New DDD pacemakers combine bipolar sensing for reliable atrial and ventricular detection with unipolar pacing, offering improved performance and maintaining simplicity.

    Area of Science:

    • Cardiology
    • Biomedical Engineering

    Background:

    • Unipolar and bipolar pacing systems have distinct advantages and disadvantages.
    • Reliable sensing in DDD pacing is crucial for effective device function.
    • Myopotentials and noise can interfere with pacemaker sensing.

    Purpose of the Study:

    • To review the relative merits of unipolar and bipolar systems in DDD pacing.
    • To introduce a novel DDD pacemaker design integrating bipolar sensing and unipolar pacing.

    Main Methods:

    • Comparative review of unipolar and bipolar pacing system characteristics.
    • Development of a new DDD pulse generator with bipolar sensing and unipolar pacing.

    Main Results:

    • Bipolar atrial sensing enhances reliability by mitigating myopotentials and noise.

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  • Bipolar ventricular sensing reduces myopotential sensing and cross-talk susceptibility.
  • Unipolar pacing generally provides superior stimulation characteristics.

    • Conclusions:

    • The new bipolar-sense/unipolar-pace DDD pacemaker offers a practical solution.
    • This design simplifies implementation based on unipolar systems.
    • The novel pacemaker retains the simplicity, convenience, and reliability of unipolar modes.