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 ...

Defibrillators and pacemakers help the heart maintain a regular rhythm. Defibrillators deliver a shock if the heart goes into arrhythmia. Pacemakers use electrical impulses to keep the heart from ...

Jon LaPook, M.D. is the award-winning chief medical correspondent for CBS News. Since joining CBS News in 2006, LaPook has delivered more than 1,200 reports on a wide variety of breaking news and ...