Heart rhythm disorders or arrhythmias can often go unnoticed. Learn about symptoms, risks, diagnosis, and how leadless ...

A biventricular pacemaker is a device that can help the heart beat more efficiently when a person has heart failure or an irregular heartbeat. When a person has heart failure or an irregular heartbeat ...

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 ...

I've seen emergency defibrillators in public places, but I've also heard that some people need to wear them or have them ...