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Related Experiment Videos

T wave sensing with a programmable pacemaker.

N D Berman

    Pacing and Clinical Electrophysiology : PACE
    |November 1, 1980
    PubMed
    Summary
    This summary is machine-generated.

    A patient experienced pacemaker rate slowing due to T-wave oversensing, where the pacemaker misinterpreted the T-wave as a QRS complex. This led to inappropriate inhibition of pacing, causing the pacemaker to discharge slower than programmed.

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    Area of Science:

    • Cardiology
    • Biomedical Engineering
    • Electrophysiology

    Background:

    • Programmable pacemakers are crucial for managing bradycardia.
    • Pacemaker function relies on sensing intrinsic cardiac activity to avoid double-pacing.

    Observation:

    • A patient with a new programmable pacemaker presented with an unexpectedly slow pacing rate.
    • The observed cycle length consistently exceeded the programmed interval.

    Findings:

    • Pacemaker recordings revealed that the T-wave's amplitude, even after the refractory period, was sufficient to be sensed.
    • This T-wave oversensing led to inappropriate pacemaker inhibition, mimicking a native R-wave.

    Implications:

    • T-wave oversensing can cause significant pacemaker malfunction, leading to suboptimal heart rate control.

    Related Experiment Videos

  • Pacemaker programming and lead placement require careful consideration to minimize oversensing events.
  • Further research into advanced sensing algorithms may mitigate T-wave oversensing in pacemakers.