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Related Experiment Videos

Pacemaker-mediated tachycardia from a single chamber temperature sensitive pacemaker.

K J Volosin1, W H O'Connor, R Fabiszewski

  • 1Division of Cardiology, Cooper Hospital/University Medical Center, Camden, NJ 08103.

Pacing and Clinical Electrophysiology : PACE
|October 1, 1989
PubMed
Summary
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Pacemaker-mediated tachycardia occurred due to a temperature-sensitive pacemaker reacting to increased right ventricular blood temperature from diaphragmatic pacing. Reducing ventricular output stopped these episodes.

Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Medical Devices

Background:

  • Pacemaker-mediated tachycardia (PMT) is a known complication of pacemaker function.
  • Single-chamber pacemakers with rate modulation present unique challenges in managing tachycardia.
  • Temperature-sensitive pacemakers introduce novel sensing mechanisms that may interact with physiological changes.

Observation:

  • A patient with a single-chamber, temperature-sensitive, rate-modulated pacemaker experienced diaphragmatic pacing.
  • Diaphragmatic pacing led to a measurable increase in right ventricular blood temperature.
  • The pacemaker sensed the temperature increase, triggering sustained upper rate limit pacing.

Findings:

  • The temperature increase in the right ventricle was directly linked to the pacemaker's response.

Related Experiment Videos

  • Sustained upper rate limit pacing, a form of pacemaker-mediated tachycardia, was initiated by the temperature-sensitive sensor.
  • Modifying pacemaker output to prevent diaphragmatic capture successfully terminated the pacemaker-mediated tachycardia.

    • Implications:

    • This case highlights a novel mechanism for pacemaker-mediated tachycardia related to temperature sensing.
    • Clinicians should consider temperature fluctuations as a potential trigger for PMT in patients with specific pacemaker types.
    • Further research into the interaction between physiological temperature changes and pacemaker function is warranted.