Atrial fibrillation (AFib) is a type of heart arrhythmia that causes the top chambers of your heart, the atria, to quiver and beat irregularly. AFib used to be described as chronic or acute, with ...

Atrial fibrillation, or AFib, is a condition in which the heart beats quickly and irregularly. According to the Centers for Disease Control and Prevention, AFib is the most common heart rhythm ...

More than 33 million people around the world have the irregular, often rapid heartbeat known as atrial fibrillation (AFib). It’s more common as you get older. But for reasons that aren’t fully ...

Atrial fibrillation (AFib) is a condition that causes your heart to beat in an irregular rhythm. One way to classify AFib is by what’s causing it. Valvular AFib and nonvalvular AFib are terms used to ...

Valvular atrial fibrillation (A-fib) involves a condition that leads to an irregular or abnormal heart rhythm. This can increase a person’s risk of cardiovascular complications, such as stroke.

Atrial fibrillation, or AFib, is the most common type of irregular heartbeat. About 2.7 million Americans have it. AFib happens when the electrical activity of the heart isn’t working the way it’s ...

Sleeping on the left side may worsen atrial fibrillation (AFib) symptoms for some people, but more research is necessary. The best sleeping position may depend on a person’s symptoms and individual ...