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Related Experiment Videos

Pacemaker-induced tachycardia during general anaesthesia: a case report.

G M Madsen1, C Andersen

  • 1Department of Anaesthesia, Odense University Hospital, Denmark.

British Journal of Anaesthesia
|September 1, 1989
PubMed
Summary

Rate-responsive pacemakers can cause tachycardia during general anesthesia if hyperventilation occurs. Reprogramming the pacemaker or using a magnet can prevent this potentially dangerous heart rhythm.

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Area of Science:

  • Cardiology
  • Anesthesiology
  • Biomedical Engineering

Background:

  • Pacemakers with rate-responsive function (RRF) are designed to adjust heart rate based on physiological demand.
  • Ventilatory minute volume is a common parameter used by RRF pacemakers to estimate metabolic needs.

Observation:

  • Hyperventilation during general anesthesia can be misinterpreted by RRF pacemakers.
  • This misinterpretation can lead to inappropriate increases in pacing rate, inducing tachycardia.

Findings:

  • Rate-responsive pacemakers utilizing ventilatory minute volume calculations may induce tachycardia in patients undergoing hyperventilation during general anesthesia.
  • Tachycardia can be avoided by reprogramming the pacemaker to a non-rate-responsive mode.

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Implications:

  • Anesthesiologists should be aware of the potential for pacemaker-induced tachycardia during hyperventilation.
  • Pacemaker reprogramming or temporary magnet application is recommended to ensure patient safety when hyperventilation is necessary.
  • This highlights the importance of understanding device-patient interactions in complex medical settings.