Acute coronary disease is one of the leading causes of death in the world. Currently 20-30% of these patients have acute renal failure forming part of the cardiorenal syndrome. Studies show that the evaluation of renal function through the estimated glomerular filtration rate (eGFR) is related to mortality in patients with cardiovascular disease, with greater precision in eGFR Chronic Kidney Disease Epidemiology Collaboration. Therefore, it is considered an immediate, easy and useful marker for the initial evaluation of patients with acute coronary disease.