According to the high morbidity and mortality of idiopathic Dilated CardioMyopathy (IDCM) in pediatric, new modality of treatment is emerging. There are some case reports of administration of stem cell therapy. The investigators design the first randomized clinical trial in this setting. The investigators enroll 32 pediatric IDCM patients in two groups (16 pts. in each group including cell therapy and control). The investigators assess the safety and efficacy of intracoronary transplantation of autologous bone marrow derived mononuclear cells in this patients compared to control group.