Objectives: We conducted a systematic review and meta-analysis to evaluate the long-term outcomes of PCI compared to CABG in patients with LMCAD.
Background: Recent data from randomized controlled trials (RCTs) has raised concerns regarding the long-term efficacy and safety of percutaneous coronary intervention (PCI) compared with coronary artery bypass grafting (CABG) in patients with left main coronary artery disease (LMCAD).
Methods: We searched MEDLINE and EMBASE databases for published RCTs comparing PCI using stenting with CABG in patients with LMCAD. Preferred reporting items for systematic review and meta-analysis guidelines were used for the present study. End-points of interest were all-cause mortality, cardiovascular (CV) mortality, myocardial infarction (MI), stroke, and repeat revascularization at longest available follow-up. Relevant data were collected and pooled odds ratio (OR) with 95% confidence intervals (CI) was calculated using random-effects model.
Results: Five RCTs including a total of 4,499 patients were included in the final analysis. Mean duration of follow-up was 96 months. The risks of all-cause mortality [OR 1.09 (95% CI 0.88-1.34)] and cardiovascular mortality [1.14 (0.88-1.47)] were comparable between PCI and CABG. There were no statistically significant differences between PCI and CABG for MI [1.52 (0.98-2.37)] and stroke [0.84 (0.48-1.45)]. Conversely, repeat revascularization was significantly higher with PCI as compared with CABG [1.82 (1.49-2.22)].
Conclusion: At long-term follow-up, PCI is associated with similar risks of mortality but a higher risk of repeat revascularization compared with CABG in LMCAD. Long-term risk of MI with PCI compared to CABG needs to be further explored in future studies.
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