Prognostic value of the syntax score in patients undergoing coronary artery bypass grafting for three‐vessel coronary artery disease

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Abstract
Background: The Syntax score prognostic value has recently been highlighted in patients undergoing percutaneous coronary intervention (PCI) for multivessel coronary artery disease (CAD), however its prognostic value in patients undergoing coronary artery bypass grafting (CABG) for multivessel CAD is still unknown. The aim of this study was to evaluate the prognostic value of the Syntax score in patients undergoing CABG for 3‐vessel CAD. Methods: A cohort of 320 consecutive patients with multivessel (3‐vessel) CAD who were subjected for CABG were included in this study and divided into tertiles according to the Syntax score (34). During the 1‐year follow‐up, cardiovascular events including death, myocardial infarction (MI), and stroke were systematically indexed. The primary end point was the composite criteria death/MI/stroke. Results: The Syntax score ranged from 11–74 with a mean of 31.2 ± 12.6 and a median of 28.5 [22–38]. Baseline clinical characteristics were similar among the tertiles. No statistical difference was found for the composite criteria death/MI/stroke: 9.4% versus 7.5% versus 10.4% in the groups with a Syntax score 34, respectively (P = 0.754). Conclusion: Unlike for PCI, the Syntax score has a poor prognostic value for severe cardiovascular events in patients undergoing CABG for 3‐vessel CAD. Other risk scores should be used to predict the outcome of this population.

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