cardiomyopathy

n. heart disease (Medicine)

Cardiomyopathy, which literally means "heart muscle disease", is the deterioration of the function of the myocardium (i.e., the actual heart muscle) for any reason. People with cardiomyopathy are often at risk of arrhythmia or sudden cardiac death or both.Cardiomyopathies can generally be categorized into two groups, based on World Health Organization guidelines: extrinsic cardiomyopathies and intrinsic cardiomyopathies.
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Cardiomyopathy is a chronic disease of the heart muscle, in which the muscle is abnormally enlarged, thickened, and/or [more]Cardiomyopathy - Community and Resources

Noun
1. a disorder (usually of unknown origin) of the heart muscle (myocardium)
(synonym) myocardiopathy
(hypernym) heart disease, heart condition, cardiopathy
(hyponym) hypertrophic cardiomyopathy

Degeneration of the myocardium.