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A new concept for atrial triggered pulse generators

K Pehrsson, J Lentell, M Levander-Lindgren

    Pacing and Clinical Electrophysiology : PACE
    |November 1, 1979
    PubMed
    Summary
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    This study introduces an improved atrial triggered (VAT) pulse generator with ventricular inhibition and a highest synchronous rate detector. This enhanced pacing system effectively manages high heart rates, improving patient tolerance and performance during increased physical activity.

    Area of Science:

    • Biomedical Engineering
    • Cardiology
    • Medical Devices

    Background:

    • Conventional atrial triggered (VAT) pulse generators face limitations like short refractory periods and electronic blocking at high synchronous rates.
    • These limitations can inconvenience patients and affect performance during increased physical demands.

    Purpose of the Study:

    • To enhance the conventional atrial triggered (VAT) pulse generator by incorporating two new functions.
    • To mitigate risks associated with high synchronous rates and improve patient outcomes during cardiac pacing.

    Main Methods:

    • The modified pulse generator includes ventricular inhibition and a highest synchronous rate detector.
    • Atrial signals are blocked and the basic pacing rate is increased when the synchronous rate exceeds approximately 140 beats per minute.

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    Main Results:

    • Two patients experienced seamless transitions from atrial triggered pacing to ventricular inhibited stimulation.
    • Both patients demonstrated improved work capacity at higher loads compared to conventional atrial triggered pacing.

    Conclusions:

    • The enhanced atrial triggered pulse generator effectively addresses limitations of conventional systems.
    • This new pacing technology offers improved performance and patient comfort, particularly during physical exertion.