Add Yahoo as a preferred source to see more of our stories on Google. Electrocardiograms, or ECGs, record the electrical activity of your heart. Randy Faris/The Image Bank via Getty Images Your ...

Defibrillators are life-saving devices designed to restore the heart’s normal rhythm during sudden cardiac arrest. They are widely available in schools, airports, gyms, and public spaces - but despite ...

Understand how defibrillators work to restart the human heart. Should you shut down your PC every night? Here's what it actually does to your computer When someone talks down to you, use Dolly ...

AEDs, or public defibrillators, are designed to be used by anyone. Try to stay calm and follow the directions that the device gives you. Share on Pinterest Aria sandi Hasim/Getty Images A ...

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 ...