T ranscatheter aortic valve implantation (TAVI) has emerged as an alternative to surgery therapy for severe aortic stenosis.1,2 The detrimental impact of baseline chronic kidney disease (CKD) on worsening the prognosis of patients undergoing surgical aortic valve replacement is well established. 3,4 Conversely, this remains a debated issue in patients undergoing TAVI.Mixed evidences are available regarding the relationship between baseline CKD and clinical outcomes in TAVI, and patients with CKD were typically under-represented in TAVI trials. On the other hand, CKD showed to be an independent predictor of mortality at 1-year after TAVI in some registries, [5][6][7][8] but not in others. 9 The degree of CKD, which exposes to the highest risk is also a matter of debate: recent data suggest that CKD stage 4 and 5, but not stage 3, are predictors of 30-day and late mortality after TAVI.10,11 Finally, cross-sectional studies failed to show a significant impact of CKD on mortality. 12,13 On this background, given the contrasting evidence and the latest literature in this field, there is a clinical and scientific rationale to investigate the impact of preoperative CKD on the clinical outcomes of patients undergoing TAVI.
Methods
Study SelectionThe study was designed according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses requirements. MEDLINE, Cochrane, ISI Web of Science, and SCOPUS databases were searched Background-There is a conflicting evidence on safety and efficacy of transcatheter aortic valve implantation in patients with preoperative chronic kidney disease (CKD). Therefore, we conducted a meta-analysis on the impact of CKD on outcomes after transcatheter aortic valve implantation.
Methods and Results-Nine