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 ...

Atrial flutter and atrial fibrillation (AFib) both occur when the electrical signals that make your heart chambers contract occur faster than typical. However, they differ in the organization of ...

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 ...

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 ...