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Grade of left main coronary artery stenosis does not influence long-term mortality after coronary artery bypass

Anders Jönsson1, Torbjörn Ivert, Tobias Nordqvist

  • 1Department of Cardiothoracic Surgery, Karolinska University Hospital, Stockholm, Sweden. anders.l.jonsson@karolinska.se

Scandinavian Cardiovascular Journal : SCJ
|July 9, 2008
PubMed

Insights

The severity of left main coronary artery stenosis does not significantly impact early or long-term mortality rates following coronary artery bypass grafting surgery. This finding suggests that stenosis grade is not a primary predictor of survival outcomes after CABG.

Area of Science:

  • Cardiology
  • Cardiac Surgery
  • Clinical Outcomes Research

Background:

  • Left main coronary artery (LMCA) stenosis is a critical condition requiring surgical intervention.
  • Coronary artery bypass grafting (CABG) is a common treatment for LMCA stenosis.
  • Understanding factors influencing mortality after CABG is crucial for patient management.

Purpose of the Study:

  • To investigate the association between the grade of LMCA stenosis and mortality.
  • To determine if LMCA stenosis severity affects early and long-term survival post-CABG.

Main Methods:

  • Retrospective analysis of 1,384 patients with LMCA stenosis undergoing CABG between 1990-1999.
  • Matched case-control study comparing 131 deceased patients with 146 survivors.
  • Classification of pre-operative LMCA stenosis grade based on angiographic findings.

Main Results:

  • High-grade LMCA stenosis was prevalent in both mortality cases (50%) and controls (45%).
  • The odds ratio for 5-year mortality associated with high-grade versus low-grade LMCA stenosis was 1.2 (95% CI 0.7-2.0) in matched pairs and 1.0 (95% CI 0.6-1.7) after multivariable adjustment.
  • Similar non-significant odds ratios were observed for early and one-year mortality.

Conclusions:

  • The grade of left main coronary artery stenosis does not appear to be a significant determinant of early or long-term mortality after CABG.
  • These findings suggest that other factors may play a more prominent role in post-CABG survival outcomes.
Abstract

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