Long-term kidney and heart outcomes after severe acute kidney injury in intensive care

This study is an ancillary analysis of the AKIKI 2 trial. The main objective is to assess whether biomarkers of inflammation and fibrosis, specifically galectin-3 (Gal-3) and CD146, measured during the acute phase of AKI, can predict and stratify long-term cardio-renal risk in patients who survived to day 60 after severe AKI in the ICU.

The primary endpoint is the occurrence, between day 60 and the last follow-up, of a composite cardio-renal outcome, defined as the first occurrence of:

* a major cardiovascular event (myocardial infarction, stroke, or hospitalization for heart failure), * a major renal event (chronic dialysis dependence or progression to severe chronic kidney disease), * or death from any cause.

Secondary objectives include :

* describing the long-term incidence of major renal events (MAKE), * describing the incidence of major cardiovascular events (MACE), * evaluating the predictive ability of Gal-3 and CD146 for the occurrence of MAKE, * evaluating their ability to predict long-term MACE and deterioration of cardiovascular function.

The study population will include patients from the AKIKI 2 trial who are alive at day 60. Follow-up data (creatinine levels, dialysis dependence, cardiovascular events, etc.) will be collected through telephone interviews with patients and their referring physicians. When appropriate, a cardiology referral will be recommended as part of routine clinical care.