Figure 3From: Pulse wave velocity and neutrophil gelatinase-associated lipocalin as predictors of acute kidney injury following aortic valve replacement Rate of AKI and need for early medical renal intervention per quartile for the 3Â h post-CPB NGAL level. There is a marked proportional relationship between increasing NGAL levels (ng/mL) and the rate of AKI and the need for early medical renal intervention. Abbreviations: CPB, cardiopulmonary bypass; NGAL, neutrophil gelatinase-associated lipocalin; AKI, acute kidney injury; Q, quartile.Back to article page