What I HAVE seen, however, was an event several years ago (1999?) when a high definition TV tower in Cincinnati, OH was activated, it shut down the University Hospital, Cincinnati's entire telemetry unit due to direct interference: not a pretty site. Seems this happened at Baylor and Methodist Hospitals in Houston, TX, and this from a communication from Univeristy of Texas regarding another hospital in Minnesota:
My wife (PICU RN) confirmed that they don't allow cellular phones on their unit but she doesn't recall problems with radios. Interesting tale from one of their medical bulletins: when a Minnesota station started broadcasting its HDTV signal it disrupted heart monitors (readout only) in the general vicinity of the TV set in one of the rooms or lounges. Don't know what happened to the pacemaker-wearers. TV you could die for!(My note: pacemakers weren't effected.) Funny how we never heard about this in the press.