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The aim of this study was to systematically search literature and conduct a meta-analysis comparing the clinical efficacy and safety of Evolut R and Sapien 3 valves for transcatheter aortic valve implantation (TAVI). The PubMed, Biomed Central, Scopus, Cochrane library and Google scholar databases were searched for articles published up to June, 2019. A total of 5 studies were included. In total, 795 patients underwent TAVI with Evolut R, while 665 patients received the Sapien 3 valve in the included studies. Overall device success with Evolut R was 95.7% and with Sapien 3 was 94.2%. Pooled data indicated no significant differences between the 2 valves (OR, 1.12; 95% CI, 0.66-1.89; P=0.68; I 2 =0%). No significant differences were observed in the incidence of none to mild paravalvular leakage between the 2 groups (OR, 1.71; 95% CI, 0.83-3.54; P=0.14; I 2 =0%). Both mean [random; mean difference (MD) = -3.96; 95% CI, -4.61 to -3.31; P&lt;0.00001, I 2 =0%] and peak (random; MD = -6.85; 95% CI, -8.22 to -5.48; P&lt;0.00001, I 2 =0%) aortic valve gradients were significantly lower with Evolut R. No significant differences were observed in the 30-day mortality (OR, 1.32; 95% CI, 0.45-3.87; P=0.62; I 2 =0%) or 30-day stroke outcomes (OR, 0.76; 95% CI, 0.32-1.81; P=0.54; I 2 =0%) between the 2 devices. On the whole, the findings of this study indicate that Evolut R and Sapien 3 valves may be comparable in terms of device success and short-term complications. The differences between the 2 devices for post-operative moderate to severe paravalvular leak and permanent pacemaker implantation remain unclear. There is thus a need for a large multi-center randomized controlled trial to provide stronger evidence on this subject.

experimental and therapeutic medicine

Safety and efficacy of self‑expandable Evolut R vs. balloon‑expandable Sapien 3 valves for transcatheter aortic valve implantation: A systematic review and meta‑analysis