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  • Title: Death and Dialysis After Transcatheter Aortic Valve Replacement: An Analysis of the STS/ACC TVT Registry.
    Author: Hansen JW, Foy A, Yadav P, Gilchrist IC, Kozak M, Stebbins A, Matsouaka R, Vemulapalli S, Wang A, Wang DD, Eng MH, Greenbaum AB, O'Neill WO.
    Journal: JACC Cardiovasc Interv; 2017 Oct 23; 10(20):2064-2075. PubMed ID: 29050623.
    Abstract:
    OBJECTIVES: The authors sought to elucidate the true incidence of renal replacement therapy (RRT) after transcatheter aortic valve replacement (TAVR). BACKGROUND: There is a wide discrepancy in the reported rate of RRT after TAVR (1.4% to 40%). The true incidence of RRT after TAVR is unknown. METHODS: The STS/ACC TVT (Society of Thoracic Surgeons/American College of Cardiology Transcatheter Valve Therapy) registry was linked to the Centers for Medicare & Medicaid database to identify all patients that underwent TAVR from November 2011 through September 2015 and their outcomes. The authors compared rates of death, new RRT, and a composite of both as a function of pre-procedure glomerular filtration rate (GFR), both in stages of chronic kidney disease (CKD), as well as on a continuous scale. RESULTS: Pre-procedure GFR is associated with the risk of death and new RRT after TAVR when GFR is <60 ml/min/m2, and increases significantly when GFR falls below 30 ml/min/m2. Incremental increases in GFR of 5 ml/min/m2 were statistically significant (unadjusted hazard ratio: 0.71; p < 0.001) at 30 days, and continued to be significant at 1 year when pre-procedure GFR was <60 ml/min/m2. One in 3 CKD stage 4 patients will be dead within 1 year, with 14.6% (roughly 1 in 6) requiring dialysis. In CKD stage 5, more than one-third of patients will require RRT within 30 days; nearly two-thirds will require RRT at 1 year. CONCLUSIONS: In both unadjusted and adjusted analysis, pre-procedural GFR was associated with the outcomes of death and new RRT. Increasing CKD stage leads to an increased risk of death and/or RRT. Continuous analysis showed significant differences in outcomes in all levels of CKD when GFR was <60 ml/min/m2. Pre-procedure GFR should be considered when selecting CKD patients for TAVR.
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