The heart is the body's hardest-working muscle. Whether you're awake or asleep, or exercising or resting, your heart is always at work. It pumps blood through arteries to deliver oxygen to organs and ...

The human heart has the ability to repair itself, scientists have found, in a breakthrough that could provide a lifeline for hundreds of thousands of patients. When someone has a heart attack or heart ...

"Heart disease is the leading cause of death worldwide, yet adult human heart muscle cells stop dividing after birth," Dr. Chaudhry said. "Our work was the first to show that we can regenerate the ...

Though an estimated 60 million people around the world have atrial fibrillation, or A-fib, a type of irregular and often fast heartbeat, it's been at least 30 years since any new treatments have been ...