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.

Implantable heart pacemakers are lifesaving devices for heart patients, emitting electrical pulses to re-establish normal heart rhythms. However, when a pacemaker's battery depletes after about 10 years, patients must undergo another surgery to replace it, which poses additional health risks and financial burdens.

Your heart’s job is to keep your pulse steady to pump blood throughout your body. Sometimes your heart rate is slower when you’re relaxing, and sometimes it’s faster when you’re exercising or stressed. If your heart’s ability to keep the beat ...

See that teeny tiny rectangle next to that pencil tip up there? That’s a pacemaker – the world’s smallest in fact, which has just been revealed in a new study. Cardiac pacemakers are up there with some of the most impressive innovations in modern ...

Innovative symbiotic transcatheter pacemaker harvests heart motion energy for lifelong pacing. Learn how this could transform cardiac care.

A pacemaker is a small, battery-powered device that controls the heartbeat. Our heartbeats are controlled by a highly efficient, biological electrical system that ensures our heart steadily pumps blood to the rest of the body. But sometimes — due to age ...

Mechanical and electrical energy are linked and can be exchanged back and forth. Just like ultrasound converts electrical voltage into pressure or sound, we can engineer similar materials onto implantable medical devices to convert the heart's natural ...