Acute kidney injury in cardiogenic shock: definitions, incidence, haemodynamic alterations, and mortality

on behalf of the CardShock Study Investigators

25 Citations (Scopus)

Abstract

Aims: To investigate the incidence, haemodynamic alterations and 90-day mortality of acute kidney injury (AKI) in patients with cardiogenic shock. We assessed the utility of creatinine, urine output (UO) and cystatin C (CysC) definitions of AKI in prognostication. Methods and results: Cardiogenic shock patients with serial plasma samples (n = 154) from the prospective multicenter CardShock study were included in the analysis. Acute kidney injury was defined and staged according to the KDIGO criteria by creatinine (AKIcrea) and/or UO (AKIUO). CysC-based AKI (AKICysC) was defined similarly to AKIcrea. Changes in haemodynamic parameters were assessed over time from baseline until 96 h. Mean age of the study population was 66 ± 12 years and 74% were men. Median baseline creatinine was 1.12 [interquartile range (IQR) 0.87–1.54] mg/dL and CysC 1.19 (IQR 0.90–1.69) mg/L. The 90-day mortality was 38%. The incidences for AKI were: AKIcrea 31%, AKIUO 50%, and AKICysc 33%. AKIcrea [odds ratio (OR) 12.2, 95% confidence interval (CI) 4.1–36.0] and AKICysC (OR 2.5, 95% CI 1.1–6.1), but not AKIUO, were independent predictors of mortality. However, a stricter UO cut-off of <0.3 mL/kg/h for 6 h was independently associated with 90-day mortality (OR 3.6, 95% CI 1.4–9.3). Development of AKI was associated with persistently elevated central venous pressure and decreased cardiac index and mean arterial pressure. Conclusions: Acute kidney injury is frequent in patients with cardiogenic shock and especially AKIcrea predicts poor outcome. The KDIGO UO criterion seems, however, rather liberal and a stricter AKI definition of UO <0.3 mL/kg/h for at least 6 h seems more useful for mortality risk prediction. Haemodynamic alterations reflecting venous congestion and hypoperfusion were associated with AKI.

Original languageEnglish
JournalEuropean Journal of Heart Failure
Volume20
Issue number3
Pages (from-to)572-581
Number of pages10
ISSN1388-9842
DOIs
Publication statusPublished - 2018

Keywords

  • Acute kidney injury
  • Cardiogenic shock
  • Haemodynamics
  • KDIGO
  • Mortality
  • Urine output

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