ACTN2 and familial dilated cardiomyopathy: Replicated densitometric measurement revealed an overall 74% decrease of desmoglein-2 signal in ARVD/C compared to controls samples, the ratio of DSG2 to α-actinin-2 (ACTN2) was 17.2 ± 6.6 in ARVD/C, 67.1 ± 9.8 in DCM samples (p<0.001, Mann Whitney Test) and 84.9 in the normal heart sample.