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 ...

Millions of people live with atrial fibrillation, a racing, uneven heartbeat that can leave you exhausted and scared. Yet it ...

The heart, as the vital organ that pumps blood to about 73 trillion cells of the human body must be sufficiently active and ...

The most comprehensive cell "atlas" of the developing human heart to date was crafted using cutting-edge technology and includes never-before-seen cell types. When you purchase through links on our ...

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 ...

Health issues in other organ systems, like the kidneys or metabolic system — which includes how the body manages weight and ...

There is still a debate about very high-level endurance exercise. While most recreational runners show no lasting harm, some ...

Aitor Aguirre receives funding from the NIH, AHA, Corewell-MSU Alliance Foundation and HVI. Aleksandra Kostina and Brett Volmert do not work for, consult, own shares in or receive funding from any ...