The results suggest that in the GSE66360 dataset, there was a conspicuously higher proportion of CD8 cells (p = 0.04), CD4 memory resting T cells (p = 2.7e-5), and gamma delta T cells (p = 2.3e-4), as well as a lower proportion of activated mast cells (p = 4.2e-10) and neutrophils (p = 9.3e-9) in the normal group compared to the MI group. The gene discussed is CD8A; the disease is myocardial infarction.