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Related Experiment Videos

Pacemaker dependency after coronary artery bypass.

S Feldman1, M Glikson, E Kaplinsky

  • 1Heart Institute, Chaim Sheba Medical Center, Tel Aviv, Israel.

Pacing and Clinical Electrophysiology : PACE
|November 1, 1992
PubMed
Summary
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Pacemaker dependency after coronary artery bypass surgery is relatively low, particularly in patients with sick sinus syndrome. Frequent reassessment of pacemaker necessity is crucial for non-dependent patients before pulse generator replacement.

Area of Science:

  • Cardiology
  • Cardiac Electrophysiology
  • Medical Device Technology

Background:

  • Coronary artery bypass surgery (CABG) can lead to cardiac conduction abnormalities requiring pacemaker implantation.
  • Pacemaker dependency, defined by pacing support needs, varies among patient groups post-CABG.
  • Understanding VVI pacemaker dependency is essential for long-term patient management.

Purpose of the Study:

  • To determine the incidence of VVI pacemaker dependency in patients following coronary artery bypass surgery.
  • To compare pacemaker dependency rates between patients with early-onset atrioventricular block and those with sick sinus syndrome post-CABG.
  • To evaluate the long-term need for pacemaker support in this patient cohort.

Main Methods:

  • Retrospective study of 36 patients (33 males, 3 females) who underwent VVI pacemaker implantation after CABG.

Related Experiment Videos

  • Patients divided into Group I (26 with early complete AV block) and Group II (10 with sick sinus syndrome).
  • Pacemaker dependency assessed by pacing at 50 bpm and hemodynamic adequacy during pulse generator replacement; mean follow-up of 3 years.

    • Main Results:

    • Group I exhibited a 65% pacemaker dependency rate.
    • Group II showed a 30% pacemaker dependency rate.
    • Significant difference in dependency rates between the two groups.

    Conclusions:

    • Pacemaker dependency is less common in patients with sick sinus syndrome post-CABG compared to those with early AV block.
    • Frequent reassessment of pacemaker necessity is recommended for non-dependent patients before pulse generator replacement.
    • Invasive evaluation may be warranted to confirm the need for continued pacemaker support in select cases.