A lifesaving shock from an implanted heart defibrillator provides relief that a crisis was avoided, but new research suggests it can also be a sign that more trouble is ahead.
A study found that heart failure patients were far more likely to die within four years after their defibrillator zapped the heart into beating normally than those who got no shock. . . .
USATODAY.com - September 3, 2008
http://www.usatoday.com/news/health/2008-09-03-defibrillator-effects_N.htm?csp=34
