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

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 ...

More than 8,000 cybersecurity vulnerabilities exist in pacemakers on the market, according to a recent report from security firm White Scope. Here are six things to know. 1. White Scope analyzed ...