Postprocedural lactate levels
Median preprocedural lactate level was 1.8 (1.3–2.3) mmol/l, with increased level reported in patients treated with higher dosage of metformin (ρ = 0.18, p = 0.027), while there was no correlation with eGFR (p = 0.984). Lactate levels measured at 72 h after coronary angiography were 1.7 (1.3–2.3) mmol/l, with no significant differences compared to preprocedural levels (p = 0.908), as the median difference between pre- and postprocedural levels was 0 (− 0.5 to 0.4) mmol/l (Fig. Cumulative curves reporting preprocedural and 72-h lactate levels and their difference. Cumulative curves depict the sum of the frequency of preprocedural, 72-h lactate levels and their difference for all patients