BACKGROUND: There is conflicting evidence on the safety and efficacy of transcatheter aortic valve implantation (TAVI) in patients with postoperative acute kidney injury (AKI). Therefore, we conducted a meta-analysis on the impact of AKI on clinical outcomes after TAVI. METHODS AND RESULTS: Twenty-four studies including 5,971 patients were analyzed. The mean incidence of AKI in this population was 22.1% ± 11.2. Postoperative AKI significantly increased early (odds ratio [OR] 5.09; 95% confidence interval [CI], 4.03-6.43 and OR 6.14; 95% CI, 3.26-11.55) and 1-year (OR 3.27; 95% CI, 2.42-4.42 and OR 1.93; 95% CI, 1.38-2.71) all-cause and cardiovascular mortality respectively, but also early myocardial infarction (OR 3.30; 95% CI, 1.44-7.57), life-threatening bleeding (OR 2.90; 95% CI, 1.67-5.05), need for transfusion (OR 2.42; 95% CI, 1.96-2.99), and dialysis (OR 14.35; 95% CI, 6.21-33.20), with a non-significant increase of stroke (OR 1.66; 95% CI, 0.94-2.95), hospitalization (mean difference [MD] 1.73; 95% CI, -0.31 to 3.77) and contrast medium received (MD 4.74; 95% CI, -2.33 to 11.81). CONCLUSIONS: Postoperative AKI seems to significantly worsen TAVI prognosis. The results of the present meta-analysis should be considered hypothesis-generating and future studies on risk stratification, prevention, and postoperative management are needed.
BACKGROUND: There is conflicting evidence on the safety and efficacy of transcatheter aortic valve implantation (TAVI) in patients with postoperative acute kidney injury (AKI). Therefore, we conducted a meta-analysis on the impact of AKI on clinical outcomes after TAVI. METHODS AND RESULTS: Twenty-four studies including 5,971 patients were analyzed. The mean incidence of AKI in this population was 22.1% ± 11.2. Postoperative AKI significantly increased early (odds ratio [OR] 5.09; 95% confidence interval [CI], 4.03-6.43 and OR 6.14; 95% CI, 3.26-11.55) and 1-year (OR 3.27; 95% CI, 2.42-4.42 and OR 1.93; 95% CI, 1.38-2.71) all-cause and cardiovascular mortality respectively, but also early myocardial infarction (OR 3.30; 95% CI, 1.44-7.57), life-threatening bleeding (OR 2.90; 95% CI, 1.67-5.05), need for transfusion (OR 2.42; 95% CI, 1.96-2.99), and dialysis (OR 14.35; 95% CI, 6.21-33.20), with a non-significant increase of stroke (OR 1.66; 95% CI, 0.94-2.95), hospitalization (mean difference [MD] 1.73; 95% CI, -0.31 to 3.77) and contrast medium received (MD 4.74; 95% CI, -2.33 to 11.81). CONCLUSIONS: Postoperative AKI seems to significantly worsen TAVI prognosis. The results of the present meta-analysis should be considered hypothesis-generating and future studies on risk stratification, prevention, and postoperative management are needed.
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