Background: Acute kidney injury (AKI) frequently occurs following transcatheter aortic valve implantation (TAVI) and has been related to a worse outcome. We investigated the importance of contrast medium composition, either iso-osmolar (IOCM) or low-osmolar (LOCM) and assessed predictors for AKI after TAVI.
Methods And Results: We assessed AKI in 203 TAVI patients treated mainly with trans-femoral implantation and analgosedation. A total of 100 patients received IOCM and 103 LOCM. AKI was defined according to the Valve Academic Research Consortium. Following TAVI, 39 patients (19.2%) developed AKI; 17.0% of the IOCM and 21.4% of the LOCM group (p=0.43). The only independent predictor for AKI was baseline serum creatinine [odds ratio (OR) 0.26, 95% confidence interval (CI) 0.01-0.64, p=0.002]. Patients with advanced AKI (stages 2 and 3) post-TAVI had significantly higher mortality at 2 years (log rank p<0.001), whereas patients with AKI stage 1 had a similar long-term outcome to non-AKI patients.
Conclusions: Following TAVI, we observed no difference in the occurrence of AKI between IOCM and LOCM. Baseline creatinine was the only independent predictor of AKI, and patients who developed advanced AKI had significantly higher mortality at 2 years.
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