 dilated cardiomyopathy or dcm is a condition in which the heart becomes weakened and enlarged and cannot pump blood efficiently. the decreased heart function can affect the lungs, liver, and other body systems. dcm is one of the cardiomyopathies, a group of diseases that affect primarily the myocardium (the muscle of the heart). different cardiomyopathies have different causes and affect the heart in different ways. in dcm a portion of the myocardium is dilated, often without any obvious cause. left or right ventricular systolic pump function of the heart is impaired, leading to progressive cardiac enlargement and hypertrophy, a process called remodeling. dilated cardiomyopathy is the most common form of non-ischemic cardiomyopathy. it occurs more frequently in men than in women, and is most common between the ages of 20 and 60 years. about one in three cases of congestive heart failure (chf) is due to dilated cardiomyopathy. dilated cardiomyopathy also occurs in children. ==causes== although in many cases no cause (etiology) is apparent, dilated cardiomyopathy is probably the result of damage to the myocardium produced by a variety of toxic, metabolic, or infectious agents. it may be due to fibrous change of the myocardium from a previous myocardial infarction. or, it may be the late sequelae of acute viral myocarditis, such as with coxsackie b virus and other enteroviruses  possibly mediated through an immunologic mechanism.{{cite journal |author=martino ta, liu p, sole mj |title=viral infection and the pathogenesis of dilated cardiomyopathy |journal=circ r
Cardiogenetic_disorders Cardiomyopathy Cytoskeletal_defects