Our next topic would be Restrictive cardiomyopathy (Definition and Pathophysiology):
Restrictive cardiomyopathy (RCM) is defined as heart muscle disease that results in impaired ventricular filling, with normal or decreased diastolic volume of either or both ventricles.
Systolic function usually remains normal, at least early in the disease, and wall thickness may be normal or increased, depending on the underlying cause.
In typical RCM, systolic function is less affected than diastolic function, and usually there is an abnormality of filling rather than of relaxation.
Thus, in most cases, there is rapid completion of filling of a poorly compliant ventricle in early diastole (E wave), with little or no further filling in late diastole (A wave).
Restrictive cardiomyopathies are the least common of the cardiomyopathy disorders.