Meta-Analysis for Impact of Statin on Mortality After Transcatheter Aortic Valve Implantation

To determine whether statin (hydroxymethylglutaryl-CoA reductase inhibitor) therapy is associated with better midterm survival after transcatheter aortic valve implantation (TAVI), the first meta-analysis of currently available studies was performed. To identify all observational comparative studies and randomized controlled trials (RCTs) of statin versus control (no statin) therapy or cohort studies investigating statin treatment as one of covariates in patients undergoing TAVI, PubMed, Web of Science, and Google Scholar were searched through March 2019. Adjusted (if unavailable, unadjusted) hazard ratios (HRs) with their confidence interval (CIs) of midterm (≥1 year) all-cause mortality after TAVI for statin therapy were extracted from each study. Study-specific estimates were combined by means of inverse variance-weighted averages of logarithmic HRs in the random-effects model. Eight eligible studies with a total of 5,170 TAVI patients were identified and included in the present meta-analysis. The primary meta-analysis (including HRs for high intensity statin from 3 studies together with other HRs) demonstrated that statin treatment was associated with significantly lower midterm mortality (HR, 0.74; 95% CI, 0.60 to 0.91; p = 0.005). The secondary meta-analysis (including HRs for low/moderate intensity statin from 3 studies together with other HRs) also indicated an association of statin therapy with significantly lower midterm mortality (HR, 0.80; 95% CI, 0.69 to 0.93; p = 0.005). No funnel plot asymmetry for the primary meta-analysis (p = 0.64) was identified, which suggested probably no publication bias. In conclusion, statin therapy is associated with better midterm survival after TAVI.