Abstract:Acute coronary syndrome (ACS), as a critical cardiovascular emergency, involves a complex pathogenesis closely associated with the interplay of multiple inflammatory factors. Currently, risk assessment for ACS primarily relies on traditional factors such as age, lipid profiles, cardiac biomarkers, and C-reactive protein, yet there remains a lack of dynamic evaluation of inflammatory status. In recent years, the neutrophil-to-lymphocyte ratio (NLR) has emerged as a novel inflammatory marker, demonstrating significant value in risk prediction and prognosis assessment in ACS. Dynamic monitoring of NLR changes can facilitate earlier identification of a patient's inflammatory response, thereby providing a scientific basis for developing individualized treatment strategies. This review summarizes recent research advances in the application of NLR for ACS risk prediction, aiming to offer new insights and references for clinical practice.