Now called Dilated Cardiomyopathy (DCM). Enlargement of heart affecting pump function.Encyclopedia Entry for Cardiomyopathy Congestive :Cardiomyopathy Congestive. Now called Dilated Cardiomyopathy (DCM). Enlargement of heart affecting pump function.Can be caused by Coxsackie B virus.Information from Marcello Allegretti.