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

If your heart beats too slowly or gets out of rhythm, a pacemaker can send an electrical pulse to that muscle and get it back on track. To do that, pacemakers need generators with batteries, and sometimes those batteries need to be replaced. But a new ...

Engineers have taken their transient pacemaker and integrated it into a coordinated network of four soft, flexible, wireless wearable sensors and control units placed on different anatomically relevant locations on the body. The sensors communicate with ...

The tiny pacemaker sits next to a single grain of rice on a fingertip. The device is so small that it can be non-invasively injected into the body via a syringe. Northwestern University engineers have developed a pacemaker so tiny that it can fit inside ...

This story is part of a series on the current progression in Regenerative Medicine. This piece discusses the regeneration of the cardiovascular system. In 1999, I defined regenerative medicine as the collection of interventions that restore to normal ...

My life depends on the functioning of a medical device: a pacemaker that generates each and every beat of my heart. I know how it feels to have my body controlled by a machine that is not working correctly, and this is why I encourage fellow security ...

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 Thursday.

Some of the most recent evidence in the desperate search for Nancy Guthrie, the 84-year-old mother of “Today” host Savannah Guthrie, is also among the case’s most disturbing: purported ransom notes sent to media outlets.