Charles J Ferro1, Colin D Chue1, Mark A de Belder2, Neil Moat3, Olaf Wendler4, Uday Trivedi5, Peter Ludman1, Jonathan N Townend1. 1. Birmingham Cardio-Renal Group, Birmingham Health Partners, Queen Elizabeth Hospital, Birmingham, UK. 2. Department of Cardiology, The James Cook University Hospital, Middlesbrough, UK. 3. Department of Cardiology, Royal Brompton and Harefield Hospitals, London, UK. 4. Department of Cardiothoracic Surgery, King's College Hospital/King's Health Partners, London, UK. 5. Sussex Cardiac Centre, Brighton and Sussex University Hospitals, Brighton, UK.
Abstract
OBJECTIVE: To determine the nature of the association between renal dysfunction and outcomes following transcatheter aortic valve implantation (TAVI) in all cases performed in the UK between 2007 and 2012. METHODS: The UK TAVI registry was established to report outcomes on all TAVI procedures performed within the UK. Data were collected prospectively on 3980 patients from 1 January 2007 until 31 December 2012. RESULTS: In total, 205 patients (5.5%) died during their admission. Moderate to advanced chronic kidney disease (CKD) (estimated glomerular filtration rate (eGFR) <45 mL/min/1.73 m(2)) was significantly associated with increased mortality, even after adjustment for risk factors (OR 1.45, 95% CI 1.03 to 2.05; p=0.04). For every 10 mL/min/1.73 m(2) decrease in eGFR, in-hospital mortality increased by 8.2% (95% CI 1.1% to 14.7%; p=0.03). In total 1119 patients (30.2%) died during the follow-up period (median 543 days). Moderate to advanced CKD (eGFR <45 mL/min/1.73 m(2)) was significantly associated with increased mortality, even after adjustment for risk factors (OR 1.36, 95% CI 1.17 to 1.58; p<0.001). For every 10 mL/min/1.73 m(2) decrease in eGFR, cumulative mortality increased by 4.4% (95% CI 1.2% to 7.5%; p=0.007). Preoperative kidney function and the need for preoperative dialysis treatment discriminated between patients who died and survived. However, predictive power was poor with none of the c-statistics being >0.6. CONCLUSIONS: Pre-procedural renal dysfunction is associated, in a graded fashion independently of dialysis status, with worse outcomes, including mortality in patients undergoing TAVI. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.
OBJECTIVE: To determine the nature of the association between renal dysfunction and outcomes following transcatheter aortic valve implantation (TAVI) in all cases performed in the UK between 2007 and 2012. METHODS: The UK TAVI registry was established to report outcomes on all TAVI procedures performed within the UK. Data were collected prospectively on 3980 patients from 1 January 2007 until 31 December 2012. RESULTS: In total, 205 patients (5.5%) died during their admission. Moderate to advanced chronic kidney disease (CKD) (estimated glomerular filtration rate (eGFR) <45 mL/min/1.73 m(2)) was significantly associated with increased mortality, even after adjustment for risk factors (OR 1.45, 95% CI 1.03 to 2.05; p=0.04). For every 10 mL/min/1.73 m(2) decrease in eGFR, in-hospital mortality increased by 8.2% (95% CI 1.1% to 14.7%; p=0.03). In total 1119 patients (30.2%) died during the follow-up period (median 543 days). Moderate to advanced CKD (eGFR <45 mL/min/1.73 m(2)) was significantly associated with increased mortality, even after adjustment for risk factors (OR 1.36, 95% CI 1.17 to 1.58; p<0.001). For every 10 mL/min/1.73 m(2) decrease in eGFR, cumulative mortality increased by 4.4% (95% CI 1.2% to 7.5%; p=0.007). Preoperative kidney function and the need for preoperative dialysis treatment discriminated between patients who died and survived. However, predictive power was poor with none of the c-statistics being >0.6. CONCLUSIONS: Pre-procedural renal dysfunction is associated, in a graded fashion independently of dialysis status, with worse outcomes, including mortality in patients undergoing TAVI. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.
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