Abstract
Aims
to evaluate prognostic significance of metabolic syndrome (MetS) in patients undergoing carotid artery revascularisation.
Methods
A systematic review and meta-analysis was performed in compliance with PRISMA standards to evaluate prognostic significance of MetS in patients undergoing carotid endarterectomy or carotid stenting. Short-term (<30 days) postoperative outcomes (all-cause mortality, stroke or transient ischaemic attack (TIA), myocardial infarction, major adverse events) and long-term outcomes (restenosis, all-cause mortality, stroke or TIA, myocardial infarction, major adverse events) were considered as outcomes of interest. Random effects modelling was applied for the analyses.
Results
Analysis of 3721 patients from five cohort studies showed no difference between the MetS and no MetS groups in terms of the following short-term outcomes: all-cause mortality (OR: 1.67,P=0.32), stroke or TIA (OR: 2.44,P=0.06), myocardial infarction (OR: 1.01,P=0.96), major adverse events (OR: 1.23, P = 0.66). In terms of long-term outcomes, MetS was associated with higher risk of restenosis (OR: 1.75,P=0.02), myocardial infarction (OR: 2.12,P=0.04), and major adverse events (OR: 1.30, P = 0.009) but there was no difference between the two groups in terms of all-cause mortality (OR: 1.11, P = 0.25), and stroke or TIA (OR: 1.24, P = 0.33). The quality and certainty of the available evidence were judged to be moderate.
Conclusions
The best available evidence suggest that although MetS may not affect the short-term postoperative morbidity and mortality outcomes in patients undergoing carotid revascularisation, it may result in higher risks of restenosis, myocardial infarction and major adverse events in the long-term. Evidence from large prospective cohort studies are required for more robust conclusions.
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