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 ...

Plus, how to calculate your ticker's 'functional age.' ...

The widow-maker is one of the deadliest kinds of heart attacks. An Arizona couple are sharing a home video to raise awareness of what a heart attack can look like. Michelle Goss shared what she and ...