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Related Experiment Videos

"Runaway" in a modern generation pacemaker

H C Odabashian, D F Brown

    Pacing and Clinical Electrophysiology : PACE
    |March 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    Pacemaker runaway, a rare but serious malfunction, caused life-threatening ventricular tachycardia in a patient. Urgent battery removal and external pacing were required to resolve the issue.

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    Area of Science:

    • Cardiology
    • Biomedical Engineering

    Background:

    • Implanted pacemakers are crucial for managing cardiac arrhythmias.
    • Pacemaker malfunction can lead to severe patient complications.

    Observation:

    • A patient experienced recurrent, life-threatening ventricular tachycardia.
    • The implanted Omni-Stanicor pacemaker exhibited episodic runaway, generating impulses from 73 to 500 beats per minute.
    • High pacing rates led to variable ventricular capture and heart rates exceeding 200 bpm, causing loss of consciousness.

    Findings:

    • Pacemaker runaway was identified as the cause of the patient's symptoms.
    • Reprogramming and external chest wall stimulation temporarily controlled the runaway but did not restore intrinsic rhythm.
    • Immediate bedside battery removal and external generator pacing were necessary for resolution.

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    Implications:

    • Pacemaker runaway, though infrequent, must be considered in patients presenting with pacemaker malfunction symptoms.
    • This case highlights the critical need for prompt diagnosis and management of severe pacemaker failures.
    • Ensuring availability of external pacing support is vital during pacemaker malfunction events.