Reduction of Inappropriate Shocks of Implantable Cardioverter Defibrillators (ICDs) With Enhanced SVT Discriminators

Inclusion Criteria: * Ischemic or nonischemic cardiomyopathy * Primary prevention or secondary prevention of Sudden cardiac death (SCD) * Indication for ICD/CRT-D new implantation per current guidelines (1, 2, 3-chamber) * The patient is ≥ 18 years of age * The patient is able to understand the patient information and is capable to provide informed consent. * The patient has provided written informed consent prior to any investigational related procedure Exclusion Criteria: * Previously implanted ICD/CRT-D * Hypertrophic (with or without obstructive) cardiomyopathy * Ion channel disorders (Long/Short-QT, Brugada syndrome etc…) * New York Heart Association (NYHA) Class IV * Recent cardiac decompensation (within previous 3 months) * The patient is unable to comply with the follow up schedule. * The patient is participating in another investigational device or drug investigation. * The patient is pregnant or is planning to become pregnant during the duration of the investigation