Depends. Dilated cardiomyopathy (dcm) prognosis depends on many things. The degree of dysfunction affects the prognosis. The degree of symptoms affects the prognosis; additionally the cause affects the prognosis as well. If the cause can be reversed by revascularization, if it is a viral etiology or a type from which recovery is possible (valve replacement, cessation of alcohol) the prognosis may by better.