The results (Figure 3) revealed that B cells, CD14+ monocytes, and plasma cells significantly decreased in DCM patients (p < 0.05), whereas CD4+ TEMs, CD8+ cytotoxic T cells (CD8+ Tc cells), CD8+ naive T cells (CD8+ Tn cells), and memory B cells significantly increased (p < 0.05). Here, CD8A is linked to familial dilated cardiomyopathy.