Prediction of Acute Kidney Injury with Venous Excess Ultrasound (VExUS) Scoring Versus Renal Resistive Index (RRI) in Patients Undergoing On-Pump Coronary Artery Bypass Grafting: A Prospective Observational Study

ABSTRACT Background: The diagnosis of acute kidney injury (AKI) using conventional markers such as serum creatinine and urine output is often delayed, prompting interest in bedside ultrasound-based predictors. This study compared renal resistive index (RRI) and venous excess ultrasound (VExUS) scoring for early prediction of AKI after on-pump coronary artery bypass grafting (CABG).