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Related Experiment Videos

Sinus node recovery function is relatively well preserved under halothane anaesthesia in children

M Iwai1, R Iwai, H Horigome

  • 1Department of Anaesthesiology, Ibaraki Children's Hospital, Mito, Japan.

Paediatric Anaesthesia
|January 1, 1995
PubMed
Summary

Halothane anesthesia slightly prolonged corrected sinus node recovery time (CSNRT) in children with congenital heart disease. However, sinus node function remained well-preserved overall under this anesthetic agent.

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Area of Science:

  • Pediatric Cardiology
  • Anesthesiology
  • Electrophysiology

Background:

  • Congenital heart disease (CHD) necessitates careful anesthetic management.
  • Sinus node recovery time (SNRT) is a critical measure of cardiac electrophysiology.
  • Understanding anesthetic effects on SNRT in pediatric CHD patients is vital.

Purpose of the Study:

  • To investigate the impact of halothane anesthesia on sinus node recovery time (SNRT) in children.
  • To assess whether halothane affects the electrophysiological recovery of the sinus node.

Main Methods:

  • Nine pediatric patients with CHD undergoing cardiac catheterization were studied.
  • Sinus node pacing was performed at various rates (120, 150, 180 bpm) under control and halothane anesthesia (1 MAC).

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  • SNRT was measured and standardized as %SNRT and Corrected SNRT (CSNRT).

    • Main Results:

    • Corrected SNRT (CSNRT) showed a statistically significant, though slight, prolongation under halothane (P = 0.042).
    • The standardized %SNRT did not demonstrate a significant prolongation.
    • These findings suggest a preserved sinus node recovery function.

    Conclusions:

    • Halothane anesthesia at 1 MAC appears to have a minimal impact on sinus node recovery function in children with CHD.
    • The sinus node's ability to recover its rhythm post-pacing is relatively well-maintained.
    • Further research may explore other anesthetic agents and dosages.