Defibrillation is a highly effective treatment for ventricular fibrillation and pulseless ventricular tachycardia when delivered promptly after the onset of cardiac arrest. As time in cardiac arrest progresses, shockable rhythms degenerate to nonshockable rhythms, global organ damage worsens, and the likelihood of successful resuscitation and neurological recovery diminishes. Reducing the time to defibrillation is therefore crucial to survival and good recovery. A key strategy to reducing time to defibrillation is harnessing the community response to deliver bystander-initiated defibrillation using an automated external defibrillator (AED). Public access defibrillator programs, where AEDs are placed in public places, have been highly effective. However, only 20% of out-of-hospital cardiac arrests occur in a public place. The majority occur in the home, where access to AEDs is limited. Strategies to enable timely community defibrillation in the home setting, such as provision of AEDs in...