With heart failure, the heart becomes enlarged and its electrical systems become stretched. This interferes with how the parts of the heart coordinate to contract and pump blood, making it inefficient ...

A pacemaker, which unconfirmed media reports say Nancy Guthrie has, does not contain GPS and cannot be used to track a person's location. A pacemaker will continue to function even if it stops syncing ...

The heart devices do not track location, nor do they transmit across large distances. By Gina Kolata Like an estimated three million Americans, Nancy Guthrie, the 84-year-old mother of the NBC News ...

Estimates suggest that around three million Americans are living with cardiac pacemakers, according to the American Heart Association. Now, thanks to MountainStar Healthcare, a new kind of pacemaker – ...

Dear Doctor: My mom is 93, and her doctor says she needs a pacemaker to control a heart arrhythmia. How does a pacemaker work? Is the operation dangerous for someone her age? Dear Reader: A pacemaker ...

See that teeny tiny rectangle next to that pencil tip up there? That’s a pacemaker – the world’s smallest in fact, which has just been revealed in a new study. Cardiac pacemakers are up there with ...

A "smart" pacemaker that kicks in only when a person's heartbeat becomes irregular can be more effective in preventing further heart damage than standard pacemakers that are always at work, ...