A fast heartbeat can be caused by emotions like stress or anxiety. Dehydration, or drinking caffeine or other stimulants, can ...

Using an organ from a donor who underwent cardiac death, Stanford Medicine surgeons transplanted a heart while it was beating—the first time such a procedure has been achieved. Initially performed by ...

See more of our coverage in your search results. Make New York Post a Preferred Source You know the feeling. When you first see your crush and your head starts spinning, your palms get sweaty, and ...

Add Yahoo as a preferred source to see more of our stories on Google. More than any other organ in the body, the heart inspires the imagination. Throughout human history, people around the world have ...