The primary objective is to determine whether dual-chamber ICD or CRT-D devices programmed with high-rate cutoff (MADIT-RIT B) and/or long delay (MADIT-RIT C) will be associated with fewer patients who experience inappropriate ATP or shock therapies when compared to standard programming (MADIT-RIT A) during the first year of post-implant follow-up of patients with indication of primary prevention device therapy.
Primary prevention patient with ischemic or non-ischemic heart disease who meets current guidelines for dual-chamber ICD or CRT-D device therapy
• Patient in sinus rhythm
•Patient on stable optimal pharmacologic therapy for the cardiac condition or has developed a recent ICD indication that necessitates ICD therapy concurrent with the optimization of pharmacologic therapy
•Patient 21 years of age or older, or legal representative, willing and capable of giving informed consent