Maintaining a stable heartbeat is critical for survival. Your heart must constantly adapt its output to meet changing demands for oxygen and nutrients. Traditionally, scientists have attributed this ...

Accurately measuring electrical signals and calcium levels in the heart can lead to earlier treatment of potentially fatal conditions, such as heart attack or congestive heart failure. Calcium plays ...

Your heart works nonstop—about 100,000 beats a day. Here are 4 surprising facts you probably didn’t know about it. The heart beats 100,000 times daily, pumping 2,000 gallons of blood. Broken heart ...