Cardiovascular disease is the leading cause of mortality in Brazil and worldwide, and ischemic heart disease accounts for a large portion of this concerning scenario. 1 Among its forms of presentation, acute coronary syndrome (ACS) has a wide range of severity. 2 However, the use of validated mathematical models of clinical prediction is essential and recommended in national and international guidelines for the management of patients with ACS. 3,4 With this stratification, high-risk patients may receive more aggressive antiplatelet and antithrombotic therapy and early invasive intervention, whereas lower-risk patients may receive less aggressive treatments. 3,5 Based on the Global Registry of Acute Coronary Events (GRACE) report, the GRACE score was designed with 8 variables analyzed on patient's admission, 6 5 semiquantitative ones (age range, heart rate, systolic blood pressure, plasma creatinine, and Killip class) and 3