NPPB and familial dilated cardiomyopathy: Post-implantation, brain natriuretic peptide (BNP) levels decreased significantly in both groups, from a median of 538 pg/mL to 88 pg/mL in DCM patients and from 533 pg/mL to 256 pg/mL in HCM-LVSD patients at three months post-implantation (p < 0.001) [38].