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 ...

Atrial fibrillation, the dangerous heart rhythm disorder commonly referred to as A-fib, affects more than 10 million U.S. adults. Even with so many people affected, doctors have been stuck with the ...

In a world-first, scientists at Tel Aviv University have successfully 3D printed a tiny human heart using real human cells. This innovation could reshape the future of organ transplants, offering a ...

Microplastics, which are less than 5 millimeters wide -- or about the size of a pencil eraser, can enter the human body through the mouth, nose and other body cavities. Getty Images This might make ...

Researchers have produced the most detailed and comprehensive human heart cell atlas to date, including the specialized tissue of the cardiac conduction system—where the heartbeat originates. The team ...

Though an estimated 60 million people around the world have atrial fibrillation, or A-fib, a type of irregular and often fast ...

In this video, Mikhail Varshavski, DO -- who goes by "Dr. Mike" on social media -- gives a history lesson on the heart, including cultural depictions and the evolution of our understanding of anatomy.

The human body is a remarkably resilient thing, as many case studies of people surviving without organs tell us ...

On a cold December morning in 1960, a small surgical team at Peter Bent Brigham Hospital in Boston gathered around an ...