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A heart that beats in regular intervals is said to be in normal sinus rhythm. Atrial fibrillation (AFib) is an abnormal heart rhythm that causes the two upper chambers of the heart, the atria, to quiver instead of contracting.

Below is a video library of atrial fibrillation content from Beaumont experts. Learn the symptoms, causes, treatments and more.

What is afib?

Symptoms and risk factors of afib

Diagnosing afib

Health risks of afib

Treatment for afib