Final answer:
Arrhythmogenic right ventricular cardiomyopathy is the type of cardiomyopathy that affects the right side of the heart, characterized by fibro-fatty tissue replacing myocardium in the right ventricle.
Step-by-step explanation:
When the heart muscle affects the right side of the heart, it would be considered arrhythmogenic right ventricular cardiomyopathy. This type of cardiomyopathy is characterized by the replacement of myocardium, primarily in the right ventricle, with fibro-fatty tissue. Arrhythmogenic right ventricular cardiomyopathy can lead to heart rhythm problems and is distinct from the other categories of cardiomyopathy, which include restrictive, dilated, and hypertrophic cardiomyopathies. While a restrictive cardiomyopathy mainly affects the filling of the heart, dilated cardiomyopathy involves the enlargement of the ventricles and is usually generalized, not restricted to the right ventricle. Hypertrophic cardiomyopathy involves pathological enlargement of the heart muscle generally without a known reason and is more commonly associated with the left ventricle.