Evaluation of Inducible Monomorphic Ventricular Tachycardia (MMVT) in Patients With St. Jude Medical (SJM) Implantable Cardioverter Defibrillator (ICD) Systems or Cardiac Resynchronization Therapy Defibrillation (CRT-D) Systems.

Exclusion Criteria

• •Patient has history of stroke.
• •Patient has had ST Segment elevation myocardial infarction (MI); or previous cardiac surgery within 60 days prior to enrollment.
• •Patient is pregnant or nursing.
• •Patient has chronic New York Heart Association (NYHA) Class IV heart failure.
• •Patient has limited life expectancy according to the investigator (less than one year).
• •Patient has had a recent coronary artery bypass graft (CABG) (\< 60 days) or percutaneous coronary intervention (PCI) (\< 30 days).
• •Patient is currently participating in an investigational drug or device study Patient is unable or unwilling to cooperate with the study procedures.
• •Patient has a prosthetic mitral or aortic valve.
• •Patient has mitral or aortic valvular heart disease requiring immediate surgical intervention.
• •Patient has Left Ventricular EF \< 15%.
• •Patient has had a previous ablation procedure for ventricular tachycardia (VT), excluding remote (\> 3 months) outflow tract tachycardia.
• •Patient has previously documented history of severe loss of kidney function or kidney failure.
• •Patient has premature ventricular contractions (PVC) or VT induced cardiomyopathy expected to resolve with ablation and will not require an ICD.
• •Patient has reversible cause of VT.