Information about Nancy Guthrie's pacemaker helped authorities piece together a new timeline in her kidnapping. Can the devices track you?

Unconfirmed media reports say Nancy Guthrie's pacemaker stopped syncing with her Apple devices. Here's what that means.

As the search for Savannah Guthrie's mother, Nancy, continues, a cardiologist explains how pacemakers work and if they can be used to track a missing person's location.

A pacemaker from Medtronic, newly approved by the Food and Drug Administration, allows patients to securely transmit data from the pacemaker to their physicians via a smartphone or tablet using ...

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

December 8, 2011 (Rennes, France) — Remote monitoring of patients with dual-chamber pacemakers "was a safe substitute for conventional follow-ups, decreased the number of [clinic] visits, and enabled ...

A: Baseline electrocardiogram of the patient in case 2 demonstrating sinus rhythm with right ventricular pacing. B: The presentation electrocardiogram of the patient in case 2 with pacemaker failure ...