Arnold Schwarzenegger said this week he had a pacemaker installed following three open-heart surgeries. The 76-year-old action star revealed the surprise health news on an episode of Arnold’s Pump ...

The world’s tiniest pacemaker — smaller than a grain of rice — could help save babies born with heart defects, say scientists. The miniature device can be inserted with a syringe and dissolves after ...

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 ...