TTN and congenital myopathy with cores: Cardiomyopathy is rarely associated with congenital myopathy, but it is a potential issue in the presence of mutations in certain genes such as TTN and MYH7. It may therefore be advisable to perform a cardiac examination with echocardiogram or electrocardiogram every 2–3 years in childhood, and every 3–5 in adulthood, or more frequently if clinical manifestations appear.