Postoperative acute kidney injury defined by RIFLE criteria predicts early health outcome and long-term survival in patients undergoing redo coronary artery bypass graft surgery

Mustafa Zakkar, Vito D Bruno, Guida A Guida, Gianni D Angelini, Pierpaolo Chivasso, M Sadeeh Suleiman, Alan J Bryan, Raimondo Ascione

Research output: Contribution to journalArticle (Academic Journal)peer-review

15 Citations (Scopus)
349 Downloads (Pure)

Abstract

OBJECTIVE: To investigate the impact of postoperative acute kidney injury (AKI) on early health outcome and on long-term survival in patients undergoing redo coronary artery bypass grafting (CABG).

METHODS: We performed a Cox analysis with 398 consecutive patients undergoing redo CABG over a median follow-up of 7 years (interquartile range, 4-12.2 years). Renal function was assessed using baseline and peak postoperative levels of serum creatinine. AKI was defined according to the risk, injury, failure, loss, and end-stage (RIFLE) criteria. Health outcome measures included the rate of in-hospital AKI and all-cause 30-day and long-term mortality, using data from the United Kingdom's Office of National Statistics. Propensity score matching, as well as logistic regression analyses, were used. The impact of postoperative AKI at different time points was related to survival.

RESULTS: In patients with redo CABG, the occurrence of postoperative AKI was associated with in-hospital mortality (odds ratio [OR], 3.74; 95% confidence interval [CI], -1.3 to 10.5; P < .01], high Euroscore (OR, 1.27; 95% CI, 1.07-1.52; P < .01), use of IABP (OR, 6.9; 95% CI, 2.24-20.3; P < .01), and reduced long-term survival (hazard ratio [HR], 2.42; 95% CI, 1.63-3.6; P = .01). Overall survival at 5 and 10 years was lower in AKI patients with AKI compared with those without AKI (64% vs 85% at 5 years; 51% vs 68% at 10 years). On 1:1 propensity score matching analysis, postoperative AKI was independently associated with reduced long term survival (HR, 2.8; 95% CI, 1.15-6.7).

CONCLUSIONS: In patients undergoing redo CABG, the occurrence of postoperative AKI is associated with increased 30-day mortality and major complications and with reduced long-term survival.

Original languageEnglish
Pages (from-to)235-242
Number of pages8
JournalJournal of Thoracic and Cardiovascular Surgery
Volume152
Issue number1
Early online date27 Feb 2016
DOIs
Publication statusPublished - Jul 2016

Structured keywords

  • Centre for Surgical Research

Keywords

  • coronary surgery
  • redo surgery
  • renal failure
  • long-term survival

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