Abdominal aortic aneurysms are significantly more common, with 200,000 people in the U.S. diagnosed each year. Here's what to ...

It’s the hardest working muscle in your body. Your heart is what operates your circulatory system. Find out how your heart pumps blood and keeps you alive. Major Funding by the Laura Moore Cunningham ...

A dangerously low oxygen level—usually below 92%—can cause shortness of breath, confusion, chest pain, or fainting. It’s ...

The heart has to work every second to ensure that oxygen and blood reach every part of the body. A blockage in the blood supply to the arteries can be life-threatening. In medical terms, this is ...