NPPB and familial dilated cardiomyopathy: Asymptomatic carriers of DCM-causative TTN variants did not differ from the control group in terms of NT-proBNP and hscTnT levels (29 vs. 19 pg/mL, p = 0.20 and <3.0 vs. <3.0 ng/L, p = 0.81, respectively), despite significantly lower LVEF (Table 4).