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 ...

The heart functions as a muscle which needs continuous movement for proper operation, according to Dr. London. The heart ...

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 ...

In TODAY.com's Expert Tip of the Day, a cardiologist explains how to slow down a racing heart in times of stress.

Dr. Myerburg answers the question: 'How Do Pacemakers Know To Pace Faster?' — -- Question: How do pacemakers know when I need a faster heart rate, for example when I am exercising or anxious?

Frequent exercise doesn't just strengthen the heart—it also changes the nerves that control it, according to new research ...

Study reveals digoxin improves heart pump function and helps ease heart failure and atrial fibrillation symptoms.

Biofeedback is a mind-body technique that helps older adults monitor and control key body functions, including heart rate, breathing, and muscle tension. By using sensors and real-time feedback, ...