Brandon Smith at Childers, Buck and Schlueter in Atlanta brought my attention to a Guidant article from Bloomberg News in the St. Paul Pioneer Press. It appears Guidant is having yet another problem with their difibrillators as almost 1000 devices may quit working prematurely.
According to the Guidant defibrillator defect article:
Defibrillators are implanted in the chests of heart-failure patients and wired directly to hearts to keep them from suddenly stopping, halting the circulation of blood throughout the body. When the device senses an abnormal heart rhythm, it fires high-voltage electrical pulses to restart the heart.