Compared to DCM, total number of MAC-1+ macrophages was twice as much in EMBs of the DCMi-low group (23.9 ± 0.4 vs. 52.0 ± 0.3 cells/mm2, p ≤ 0.001) and even 4-times higher in DCMi-high patients (103.0 ± 1.0 cells/mm2, p ≤ 0.001) (Table 1, Suppl. The gene discussed is ITGAM; the disease is familial dilated cardiomyopathy.