Causes of dilated cardiomyopathy (DCM)

Dilated Cardiomyopathy. [Source]

Dilated cardiomyopathy encompasses a heterogeneous group of conditions.
This is the most common type of cardiomyopathy.

In this disorder, your heart's main pumping chamber — the left ventricle — becomes enlarged (dilated), its pumping ability becomes less forceful, and blood doesn't flow as easily through the heart.

Although this type can affect people of all ages, it occurs most often in middle-aged people and is more likely to affect men. Some people with dilated cardiomyopathy have a family history of the condition. About 25% of cases are inherited as an autosomal-dominant trait.