Implantable Cardioverter Defibrillators (ICDs) and Cardiac Resynchronization Therapy Defibrillators (CRT-Ds) by St. Jude Medical: FDA Safety Communication - Batteries May Fail Earlier Than Expected

In some cases full battery drainage can occur within a day to a few weeks after patient receives ERI alert. If battery runs out, ICD or CRT-D will be unable to deliver life-saving pacing or shocks, which could lead to patient death.