The study will enroll subjects who are indicated to receive an implantable defibrillator and who meet all of the inclusion criteria and none of the exclusion criteria. Subjects will receive an investigational Extravascular Implantable Cardioverter Defibrillator (EV ICD) system, in which a lead is placed outside of the heart and veins to deliver defibrillation therapy. Subjects will be followed until regulatory approval is received.
Pivotal Summary:~The study is designed to demonstrate safety and efficacy of the Extravascular Implantable Cardioverter Defibrillator (EV ICD) System.~Continued Access Summary:~This study is designed to provide continued access to the Extravascular Implantable Cardioverter Defibrillator (EV ICD) System.