If you have a racing or irregular heartbeat, also known as an arrhythmia, one likely suspect is atrial fibrillation (AFib).

We may have the final word on homocysteine: higher blood levels of the amino acid don’t raise people’s risk of heart disease after all. Several decades ago, studies of children born with an unusual ...

Sign up for CNN’s Sleep, But Better newsletter series. Our seven-part guide has helpful hints to achieve better sleep. About 1 in 4 women may experience irregular ...