The human heart is a vital organ that pumps blood through the body. You probably don't even think about it, but your heart is always working — it beats about 100,000 times a day, which adds up to about 3 billion beats over an average lifetime. Here's the latest science news about your ticker.
Latest about Heart & Circulation
How do fitness trackers measure your heart rate?
Everything you need to know about photoplethysmography (PPG), the technology behind heart rate measurements in fitness watches and smart rings.
'Breakthrough' stem-cell patches stabilized woman's heart as she awaited transplant
A woman with heart failure was kept alive long enough to receive a heart transplant, in part thanks to newly developed stem-cell-derived heart tissue grafts.
Diagnostic dilemma: A woman got 'broken heart syndrome' after eating too much wasabi
The patient was diagnosed with takotsubo cardiomyopathy, also known as "broken heart syndrome," which had an unusual cause.
How many blood types are there?
Red blood cells are complex — there's much more to blood types than A, B and O.
Women are at higher risk of dying from heart disease. Here's why.
Cardiovascular disease develops and presents differently in women and men. But medical guidelines are often based on studies that excluded women.
'Wake-up call': Women are more likely than men to die of complications after heart surgery
Complications that arise after surgery are more likely to be underrecognized and undertreated in women than in men, leading to higher death rates, new research suggests. Why?
How many times does a heart beat in a day? What about in a lifetime?
Celine Dion sings that "my heart will go on," but how many times does it actually beat in a day or even a lifetime?
Paramedics may not all be using the best method for defibrillation, study hints
Positioning defibrillator pads on the front and back of the body, rather than on the front and side, could be more effective at treating cardiac arrests, new research suggests.
