Security experts hired by the investment firm Muddy Waters (which is being sued for defamation by St. Jude Medical Inc. over claims that St. Jude’s cardiac implant device can be hacked) disclosed in an October court filing that they agree the devices are anonymously and maliciously hackable. 

They found that a popular control device (Merlin@Home) could be remotely turned off, or jiggered to carry a dangerous electrical charge from up to 100 feet away. A similar incident was part of a plot in Season 2 of the Homeland TV series, as the means by which the ailing U.S. vice president was assassinated.