Semi‐quantitative analysis (Figure 3B‐D) showed a significantly higher number of CD3+ T cells, CD68+ macrophages and CD20+ B cells in both IHD and DCM patients, as compared to controls (T cells: DCM P = .02, IHD P = .02; macrophages: DCM P = .002, IHD P = .014; and B cells: DCM P = .02, IHD P = .04). Here, CD68 is linked to familial dilated cardiomyopathy.