If you have a family history of MD and have similar symptoms the doctor might do:
-Enzyme tests as damaged muscles release Enzymes like CK into the blood
-Genetic testing as it can show which type of MD it is and also look for mutations
-Muscle biopsy this is when you remove a small part of the patients Muscle and determine if it is MD or another disease
-Heart monitoring Test as the hearts tissue become more fatty and fibrotic causing arrhythmia