However, in a recently published study, urinary NGAL levels in 34 consecutive patients measured 4 h after transfemoral TAVI were comparable between patients with AKI and those without (41.6 ± 35.7 vs. 45.3 ± 38.7 ng/mL, p = 0.57) [19]. Here, LCN2 is linked to acute kidney injury.