Z-log NT-proBNP levels were highest in DCM (3.28 ± 2.12), intermediate in HCM (1.99 ± 1.99), and lowest in controls (0.31 ± 0.64), showing the pattern DCM > HCM > Control (p < 0.01). The gene discussed is NPPB; the disease is familial dilated cardiomyopathy.