Promote Q Cardiac Resynchronization Therapy Defibrillator (CRT-D) and Quartet Left Ventricular Heart Lead Study

Inclusion Criteria: * Approved indication per ACC/AHA/HRS guidelines for implantation of a CRT-D system for treatment of heart failure or lifethreatening ventricular tachyarrhythmia(s) * Receiving a new implant or undergoing an upgrade from an existing ICD or pacemaker implant with no prior LV lead placement. * Ability to provide informed consent for study participation and is willing and able to comply with the prescribed follow-up tests and schedule of evaluations Exclusion Criteria: * Have had a recent CVA or TIA within three months of enrollment * Have a contraindication for an emergency thoracotomy * Have a hypersensitivity to a single 1.0mg dose of dexamethasone sodium phosphate or short term contact with heparin * Have a classification of Status 1 for cardiac transplantation or consideration for transplantation over the next 3 months * Have undergone a cardiac transplantation within 40 days of enrollment * Have had a recent myocardial infarction, unstable angina or cardiac revascularization (PTCA, Stent or CABG) within 40 days of enrollment * Are currently participating in a clinical investigation that includes an active treatment arm * Are pregnant or planning to become pregnant during the duration of the study * Have a life expectancy of less than 6 months due to any condition * Are less than 18 years of age * Are unable to comply with the follow up schedule