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Surgical Swine Model of Chronic Cardiac Ischemia Treated by Off-Pump Coronary Artery Bypass Graft Surgery
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Influence of left ventricular function on survival after coronary artery bypass grafting

E Ståhle1, R Bergström, B Edlund

  • 1Department of Thoracic and Cardiovascular Surgery, University Hospital, Uppsala, Sweden.

The Annals of Thoracic Surgery
|August 1, 1997
PubMed

Insights

Preoperative left ventricular function significantly impacts survival after coronary artery bypass grafting (CABG). Early surgery before significant deterioration leads to excellent long-term survival outcomes.

Area of Science:

  • Cardiology
  • Cardiac Surgery
  • Outcomes Research

Background:

  • Preoperative left ventricular (LV) function is a key predictor of survival in ischemic heart disease patients.
  • Optimal timing for coronary artery bypass grafting (CABG) remains crucial for patient outcomes.

Purpose of the Study:

  • To investigate the influence of preoperative LV function on relative survival after CABG.
  • To determine the optimal timing for CABG based on LV performance and functional class.

Main Methods:

  • Compared 6,514 CABG patients to the general Swedish population for relative survival estimation.
  • Analyzed LV function at rest, New York Heart Association (NYHA) class, and prior myocardial infarctions (MI) in relation to survival.
  • Developed a risk score based on multivariate analysis of key patient variables.

Main Results:

  • LV function, NYHA class, prior MIs, age, and follow-up year independently predicted relative survival.
  • A risk score categorized patients into low, medium, and high-risk groups.
  • Low-risk patients (30%) had better survival than the general population for 9 years; high-risk (25%) showed immediate excess mortality.

Conclusions:

  • Excellent survival rates are achievable with CABG if performed before significant deterioration of LV function and physical capacity.
  • Early intervention in ischemic heart disease patients with preserved LV function is associated with superior long-term outcomes.
Abstract

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