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 ...

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.

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

Leonardo Da Vinci was one of the first people to draw detailed sketches of human anatomy. His drawings showed that he noticed networks of muscle fibers on the inside of the heart. Da Vinci thought ...