Myocarditis, when the heart muscle gets inflamed, can make it harder for the heart to pump blood possibly causing chest pain, ...

U.S. health officials have expanded warnings about a rare heart side effect associated with the two leading COVID-19 vaccines ...

Researchers found that when subjects slept during the day and were active at night, it had a negative impact on markers for ...

An Army Veteran and Purple Heart recipient who has lived in the U.S. for more than four decades self-deported to South Korea ...

The FDA has updated labels on the top two COVID-19 vaccines to warn of a rare heart side effect, mostly seen in young men.

Research shows heart attack deaths have plummeted by nearly 90% since 1970, while deaths from heart failure and arrhythmias ...