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

Data from Nancy Guthrie's pacemaker has helped shed light on the events leading up to her kidnapping, but there are significant limits in how much data the devices can collect. Most importantly for ...

Nancy Guthrie’s 2 a.m. pacemaker spike on the day she vanished could mean that the elderly woman was involved in a heart rate-surging struggle with her possible captors, a lead cardiologist speculated ...

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 ...

The Pima County Sheriff's Department previously highlighted the significance of Nancy’s pacemaker in the investigation, revealing additional details about its role in an approximate timeline of her ...

Imagine a heart patient with a pacemaker—one of the millions who rely on these tiny, implanted devices to keep their hearts beating steadily. While pacemakers save lives every day, their ability to ...

DENVER (KDVR) — One part of the investigation into the disappearance of “Today” show host Savannah Guthrie’s mother focuses on the missing woman’s implanted medical device. Investigators found Nancy ...

It has been four days since Savannah Guthrie's mother Nancy was abducted from her home in the middle of the night. Police have said they still hope to find the 84-year-old alive, but fears are growing ...

The best-planned defenses don’t count for much if the people you trust to run them are ready to sell you out.