Follow-up visits will occur at 3 and 6 months following randomization and every 6 months thereafter until the end of the study. The tests performed at the randomization visit (Quality of Life Questionnaire, EKG, 6 minute hall walk, CPX and echocardiogram) will be repeated at the 6-month follow-up visit. Additionally, each visit will include a review of the patient's condition and current medications and an evaluation of the CRT-D device.