Ranolazine Implantable Cardioverter-Defibrillator Trial

Inclusion criteria

• ✓. Patients with primary prevention indications for ischemic or non-ischemic cardiomyopathy with EF≤35%, with existing devices (ICD/CRT-D), regardless of when the device was implanted, who have experienced at least ONE episode of VT/VF appropriately treated with ICD therapy (ATP or shock) or had untreated NSVT lasting at least 10 beats with heart rate of at least 170 bpm, documented by electrogram of their implanted device.
• ✓. Patients with ischemic or non-ischemic cardiomyopathy with EF≤35%, who have been implanted within the last 2 years (initial ICD/CRT-D implants, including upgrades from pacemakers) who have NOT experienced VT/VF treated with ICD therapy (ATP or shock), AND who have one of the following additional criteria: BUN≥26 mg/dl or QRS\>120ms or Atrial Fibrillation or NSVT documented by ECG/Holter or \>500 Ventricular Premature Beats (VPBs)documented in a 24-hour Holter.