And why you shouldn’t hesitate to call your doc if you’re not sure.

Heart cells stay fueled up by burning multiple energy sources simultaneously—a unique ability that's crucial to preventing ...

Kali Muscle shows the LifeVest he says he must wear after a heart attack. He demonstrates the plates, waist strap, battery ...

A cellular fuel called lactate is channelled directly into energy-generating organelles in heart muscle, defying the ...

Narrowed heart arteries can cause breathlessness, unusual fatigue or discomfort outside the chest, as well as the familiar ...

A new review in Biological Research surveys cardiac stem and progenitor cell populations, finding that classic markers c-kit ...

Over the decades, the odds that any given death was heart-related increased by more than 2% each year among on-duty firefighters, even as the odds of heart-related deaths for the general public fell ...

A heart attack does not always begin with unmistakable chest pain. Some women experience unusual tiredness, shortness of ...

Can you tell us why there are so many different statins and what each one is supposed to do that the others don’t? I know ...

Discover how celebrities like Joe Biden, Elton John, and Miley Cyrus manage irregular heart rhythms such as atrial ...

The heart is the hardest-working muscle in the body, beating constantly no matter what the body's energy reserves look like.