A retrospective study of 3,280 acute myocardial infarction patients found a U-shaped relationship between the Remnant Cholesterol Inflammation Index and 30-day major adverse cardiovascular and cerebrovascular events. The work suggests both low and high index values correlate with worse early outcomes, emphasizing the potential of combined lipid-residue and inflammatory scoring rather than single-marker approaches. The findings add to interest in risk stratification tools that could refine early post-MI monitoring and guide intensity of secondary prevention.