11.   One implants such devices only if the abnormal heart rhythms have the potential to progress to a chaotic, rapid rhythm that could lead to sudden death.

12.   Such devices usually are implanted under the skin between the collarbone and nipple.

13.   The device is implanted in the patient to restore normal rhythms to hearts that beat too fast.

14.   They help the doctor determine what treatment is most appropriate -- medication, surgery or implanted electronic devices such as pacemakers and defibrillators.

15.   To implant the device, surgeons drill a hole through the skull and pass electrodes deep into the thalamus area of the brain.

16.   When the risk was affirmed, the doctors implanted a device that provides a record of every heart beat and is both a pacemaker and a defibrillator.

17.   A device was implanted in her side to shock her heart into the proper rhythm.

18.   Kenyon, whose device was implanted at Yale-New Haven Hospital, delights in telling stories of the lighter side of life with an artificial heart.

19.   Niparko said the devices are implanted in children who are born profoundly deaf because a key part of the ear, called the cochlea, fails to function properly.