Fig. 2

Incidence of CA-AKIa and postprocedural acute heart failure (AHF) in the SH group and control group in the low- to moderate-risk and high to very high-risk MRS group, respectively. CA-AKIa indicates a ≥ 25% or 0.5 mg/dL absolute increase in Scr from baseline during the first 48 to 72 h after the procedure. SH group, simplified rapid hydration group; control group, standard hydration group