Implantable Defibrillators Can Be Erratic, Studies Find
Implantable defibrillators, which can deliver a life-saving shock to people with damaged hearts, had a roller-coaster record of reliability, as the rate of malfunctions fell in the early years, rose in the late 1990s and recently declined again.
Compared with pacemakers, which are simpler and serve a different purpose, implantable defibrillators are five to 20 times more likely to malfunction and need replacement
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