two forms can be distinguished : a latent one ( 65 % ) , in which the changes are predominantly electrocardiographic , and a clinical form ( 35 % ) with the features of congestive cardiomyopathy , notable for the rapidity of onset after right heart failure , the degree of cardiomegaly , the constant finding of abnormalities of ventricular repolarisation , the relative frequency of latent disorders of supra-his atrio-ventricular conduction , and the finding of elongation of the isovolumic contraction time on the phonomechanocardiogram .
C0007193
congestive cardiomyopathy
C0018800
cardiomegaly