Variants in genes encoding for other sarcomeric proteins [e.g. myosin heavy chain (MYH7), cardiac troponin T (TNNT2), α‐tropomyosin (TPM1), cardiac troponin C (TNNC1), cardiac troponin I (TNNI3)], are considered to be disease‐causing in up to 10% of patients with DCM.4 Here, TNNI3 is linked to familial dilated cardiomyopathy.