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

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

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.

By Gina Kolata Like an estimated three million Americans, Nancy Guthrie, the 84-year-old mother of the NBC News anchor Savannah Guthrie, has a pacemaker implanted in her chest. Law enforcement ...

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 ...

Some of the most recent evidence in the desperate search for Nancy Guthrie, the 84-year-old mother of “Today” host Savannah ...

Dr. Srihari S. Naidu speaks with Parade to answer all our questions about pacemakers.

Nancy Guthrie's pacemaker stopped syncing with her Apple devices before her disappearance, a detail emerging as police shift focus to investigation. Authorities found her phone and watch inside her ...

Begin building a smart home by choosing a primary platform like Alexa, Google, or Apple for easier integration. Smart devices such as speakers, lighting, and thermostats can add convenience and peace ...

Agents were seen at the home belonging to "Today" anchor Savannah Guthrie's older sister just hours after all three Guthrie siblings posted an update on the case.

In a first, this week the U.S. Food and Drug Administration approved a brain stimulation device designed to treat depression at home. The approval of the first such device for home depression ...