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BACKGROUND: Randomized trials and meta-analyses demonstrated that chronic total occlusion (CTO) in noninfarct related artery (n-IRA) was associated with increased all-cause mortality. Recently, several observational studies suggested that the successful revascularization of n-IRA with CTO decreased all-cause mortality. METHODS: A systematic search was performed in Cochrane Controlled Trials Registry, PubMed, MEDLINE, and EMBASE databases for relevant studies. Article assessing the prognostic role of revascularization of n-IRA with CTO was enrolled in this meta-analysis. Data and characteristics of each study were extracted. A meta-analysis was performed to generate pooled odds ratio (OR) and 95% confidence intervals (95% CIs) for outcomes. The primary outcome was major adverse cardiac events (MACE). Beg funnel plot was used to evaluate publication bias. RESULTS: Four observational studies and one randomized controlled trial involving 1083 patients were enrolled for analysis. Compared with nonreperfusion, the successful percutaneous coronary intervention (PCI) of n-IRA with CTO was related to decreased all-cause mortality (OR was 0.34, and 95% CI was 0.2-0.59; P = .0001). CONCLUSIONS: Successful PCI of n-IRA with CTO could significantly decrease all-cause mortality, cardiac mortality, MACE, and stroke in acute myocardial infarction patients. In addition, it was not associated with the increased risk of repeat revascularization and myocardial infarction.
Tong et al. (Mon,) studied this question.