[Genetics of dilated cardiomyopathies].

So-called idiopathic dilated cardiomyopathy is a multifactorial condition. Its familial nature is increasingly commonly observed in genealogical studies. The Cardiomyopathy Working Group of the French Cardiological Society has recensed 31 families with two or more members with dilated cardiomyopathy. This led to the search for genetic abnormalities in this condition, as it has been performed in other diseases, especially primary hypertrophic cardiomyopathies.