the fda says, so far, it's not aware of any patient injuries or deaths from the hacking of medical equipment. but mcclure says almost everything's wide open. pacemakers and other cardiac equipment can be slowed or disabled, monitors could shut off. at beth israel deaconess medical center in boston a few years ago, a glitch, not a hack, slowed down fetal monitors for women with high-risk pregnancies. the computer systems for these devices are interconnected, wide open and widespread. >> on an average day, beth israel deaconess has 15,000 devices connected to its network, things you wouldn't normally think of as being connected to a network, like a monitor or an iv pump today are smart. >> reporter: dr. john halamka says his hospital does firewall off its systems to prevent hacking, but even with the fda tightening up on manufacturers, experts say it will be a long time before the manufacturers really get safer devices in place. the manufacturers may fight it