Myocardial infarction (MI) remains one of the leading causes of mortality and disability worldwide, which necessitates accurate and timely assessment of the risk of adverse outcomes. Modern clinical practice uses a number of prognostic scales, including TIMI, GRACE, PURSUIT, and HEART, each of which has proven effectiveness but also certain limitations related to narrow focus, complexity of calculation, or lack of dynamic reassessment of the patient's condition. This paper presents an extended analysis of existing risk assessment scales for myocardial infarction, compares them, and proposes a scoring scale—the Myocardial Infarction Grading Scale (MIGS)—that integrates clinical, symptomatic, laboratory, and instrumental indicators. A mathematical model based on a weighted sum of risk factors with logistic transformation has been developed for MIGS, allowing quantitative assessment of the likelihood of complications and fatal outcomes. Examples of scoring calculations for various clinical scenarios are presented, as well as a graphical visualization of the dependence of the probability of complications on the total MIGS score. It is shown that the scale has advantages over traditional tools due to its comprehensive approach, dynamic monitoring capabilities, and integration into digital clinical systems. The results obtained indicate the feasibility of using MIGS in inpatient and emergency cardiology practice to improve the accuracy of risk stratification and personalization of treatment tactics.