A pacemaker is a small device that can send electrical signals to your heart. Here's who needs a pacemaker and how it works.

BIRMINGHAM, UK — A new study finds 3.0 to 7.6 times higher permanent pacemaker implantation rates after valvular surgery compared with CABG, with risk particularly high after dual and triple valve ...

During an average lifetime, the heart beats more than 2 billion times. To you, it might just be a steady “lub-dub” that speeds up under pressure and slows as you drift to sleep. But behind that rhythm ...

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 ...