The most common genes encoding sarcomeric proteins that are affected in DCM are: β-myosin heavy chain (MYH7) [51], TNNT2 [52], α-tropomyosin (TPM1) [53], troponin-C1 (TNNC1) [54], TNNI3 [55], titin (TTN) [56], and actin (ACTC1) [57]. The gene discussed is TTN; the disease is familial dilated cardiomyopathy.