Dilated cardiomyopathy

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 sequel of acute viral myocarditis, possibly mediated through an immunologic mechanism. Autoimmune mechanisms are also suggested as a cause for dilated cardiomyopathy. A reversible form of dilated cardiomyopathy may be found with alcohol abuse, pregnancy (peripartum cardiomyopathy), thyroid disease, stimulant use, and chronic uncontrolled tachycardia. Many cases of dilated cardiomyopathy are described as idiopathic - meaning that the cause is unknown.

- wiki

Oh this is very curious. How wonder how obesity can develope cardimyopathy. According to some source, it's related to the increased volumn of blood.. hmm.. interesante.