MYH6 mutations cause HCM, DCM, and congenital heart disease with incomplete penetrance (Carniel et al., 2005; Ching et al., 2005; Granados‐Riveron et al., 2010; Gruner et al., 2011; Hershberger et al., 2010; Posch et al., 2011). Here, MYH6 is linked to familial dilated cardiomyopathy.