Meta-analysis of Temporal and Surgical Risk Dependent Associations With Outcomes After Transcatheter Versus Surgical Aortic Valve Implantation

Abstract

Temporal and surgical risk dependent associations with clinical outcomes in patients receiving transcatheter versus surgical aortic valve implantation (TAVI vs SAVI) are uncertain. In this meta-analysis, 7 randomized controlled trials (7,771 patients) were included to investigate trends in outcomes in TAVI versus SAVI up to 5 years, and variation in outcomes with respect to low-, intermediate-, and high-surgical risk of the patients up to 1 year. Estimates were calculated as random effects hazard ratios (HRs) with 95% confidence intervals (CI). All-cause mortality was similar in TAVI and SAVI at 30 days (HR 0.81, 95% CI 0.55 to 1.21, p = 0.31), 1 year (HR 0.97, 95% CI 0.89 to 1.06, p = 0.49), 2 years (HR 0.96, 95 CI 0.85 to 1.09, p = 0.54), and 5 years (HR 1.04, 95% CI 0.89 to 1.21, p = 0.62). Cardiac mortality, myocardial infarction and stroke were similar in both interventions up to 5 years. TAVI was associated with lower risk of atrial fibrillation, but higher risk of vascular complications, pacemaker implantation, and paravalvular leak up to 5 years. The lower risks of major bleeding and acute kidney injury with TAVI versus SAVI were limited to 1 and 2 years, respectively. Compared with SAVI, TAVI was superior in reducing all-cause mortality in low surgical risk patients at 30 days only, whereas TAVI was noninferior to SAVI in intermediate- and high-risk patients at 30 days and across all risks at 1 year. In conclusion, TAVI was noninferior to SAVI in terms of mortality, myocardial infarction, and stroke up to 5 years. TAVI improved survival versus SAVI in low-risk patients at 30 days.