Zoll LifeVest 4000 Wearable Cardioverter Defibrillator - Potential Lack of Treatment (Shock) Delivery Due to Device Failure: FDA Safety Communication

FDA is providing information and recommendations regarding the Zoll LifeVest 4000 due to concerns that the device may fail to deliver treatment to the patient if the device is not replaced soon after displaying "Call for service: Device has a problem that may require service. Call ZOLL for service, Message Code 102." Failure to contact Zoll and immediately replace the device after Message Code 102 appears on the device screen may result in serious patient harm or death of the patient because the device may fail to deliver therapy appropriately when needed.