Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Cardiomyopathy ?
    ### Response:
    Cardiomyopathy refers to diseases of the heart muscle. These diseases have many causes, signs and symptoms, and treatments.
                
In cardiomyopathy, the heart muscle becomes enlarged, thick, or rigid. In rare cases, the muscle tissue in the heart is replaced with scar tissue.
    