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How does atrial fibrillation (AFib) happen?

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Atrial fibrillation (AFib) is the most common problem with the heartbeat's rate or rhythm. Disorganized signals make the heart's two upper chambers (the atria) squeeze very fast and out of sync. They contract so quickly that the heart walls quiver, or fibrillate.

SOURCES:

Merck Manual: "Atrial Fibrillation and Atrial Flutter."

Cleveland Clinic: "What is Atrial Fibrillation?"

National Heart, Lung and Blood Institute: "Who is at Risk for Atrial Fibrillation?" "What Causes Atrial Fibrillation?" and "What is Atrial Fibrillation?"

American Heart Association/American Stroke Association: "When the Beat is Off: Atrial Fibrillation."

Theheart.org: "Diabetes associated with risk of atrial fibrillation."

The Lancet: "Predicting atrial fibrillation - Authors' reply."

Reviewed by Suzanne R. Steinbaum on May 3, 2018

SOURCES:

Merck Manual: "Atrial Fibrillation and Atrial Flutter."

Cleveland Clinic: "What is Atrial Fibrillation?"

National Heart, Lung and Blood Institute: "Who is at Risk for Atrial Fibrillation?" "What Causes Atrial Fibrillation?" and "What is Atrial Fibrillation?"

American Heart Association/American Stroke Association: "When the Beat is Off: Atrial Fibrillation."

Theheart.org: "Diabetes associated with risk of atrial fibrillation."

The Lancet: "Predicting atrial fibrillation - Authors' reply."

Reviewed by Suzanne R. Steinbaum on May 3, 2018

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Who is more likely to get atrial fibrillation (AFib)?

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