![]() Changes in the pattern of electrical activity can confirm a muscle disease. Electrical activity is measured as you relax and as you gently tighten the muscle. An electrode needle is inserted into the muscle to be tested. These tests are used to check lung function. ![]() These tests are used to check heart function, especially in people diagnosed with myotonic muscular dystrophy. Heart-monitoring tests (electrocardiography and echocardiogram).Analysis of the tissue sample can distinguish muscular dystrophies from other muscle diseases. A small piece of muscle can be removed through an incision or with a hollow needle. ![]() Blood samples can be examined for mutations in some of the genes that cause types of muscular dystrophy. In a person who hasn't had a traumatic injury, high blood levels of creatine kinase (CK) suggest a muscle disease. Damaged muscles release enzymes, such as creatine kinase (CK), into your blood. Your doctor is likely to start with a medical history and physical examination. ![]()
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