In children under 2 years of age, MYH7 was predominantly mutated and no TTN variants were found.10 This matches our findings as 6 of 8 children in our cohort with LP/P MYH7 variants were under the age of 1 year at diagnosis, confirming that these variants frequently underlie DCM with infant presentation. Here, MYH7 is linked to familial dilated cardiomyopathy.