- Idioatic dilated cardiomyopathy (CMP) represents the final common expression of primary myocardial damage produced by a variety of as yet undefined myocardial insults, producing areas of interstitial and perivascular fibrosis, particularly of the left ventricle. Chronic HF, including CMP, is a progressive disease with high morbidity and mortality, suggesting that important pathogenic mechanisms remain active and unmodified by the present treatment modalities. The presence of chronic inflammation in patients with chronic heart failure has been widely recognized and coupled with persistent immune activation may represent such unmodified mechanisms.