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Pacemaker implantation for early sinus node dysfunction after orthotopic heart transplantation

M A Radermecker1, J O Defraigne, J Fourny

  • 1Department of Cardiovascular Surgery, University Hospital of Liège, Belgium.

Acta Chirurgica Belgica
|January 1, 1995
PubMed
Summary

Orthotopic heart transplant (OHT) recipients may experience temporary sinus node dysfunction requiring pacemakers. Sinus function often recovers within months, allowing pacemaker weaning, but beta-blockers can reintroduce dependence.

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Area of Science:

  • Cardiology
  • Transplantation Medicine
  • Electrophysiology

Background:

  • Orthotopic heart transplantation (OHT) can affect cardiac conduction.
  • Sinus node dysfunction is a potential complication post-transplant.

Purpose of the Study:

  • To investigate the incidence and management of sinus node dysfunction in OHT recipients.
  • To understand the factors influencing sinus node recovery and pacemaker dependence.

Main Methods:

  • Retrospective analysis of 60 OHT patients (1986-1990).
  • Identification and management of patients requiring permanent pacemaker implantation.
  • Monitoring of sinus node function, pacemaker dependence, and response to medications.

Main Results:

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  • Four out of 60 OHT patients required permanent pacemakers for symptomatic sinus node dysfunction.
  • Three patients showed sinus recovery within three months, enabling pacemaker mode change.
  • Beta-blocker administration reinstituted pacemaker dependence.
  • High incidence of early post-operative infections (CMV) and severe rejection observed in paced patients.
  • Excellent long-term patient outcomes (18-48 months follow-up).

Conclusions:

  • Sinus node dysfunction post-OHT may result from multifactorial injury (rejection, CMV).
  • Sinus recovery is possible, potentially due to denervation hypersensitivity and correction of underlying factors.
  • Temporary pacemaker support is effective, with potential for weaning in many OHT patients.