Heart & Circulation

Atrial fibrillation

Also called: AF · AFib

What does Atrial fibrillation mean?

A common irregular rhythm arising in the upper chambers of the heart. It can increase stroke risk.

U.S. National Library of Medicine
Understanding Medical Words ↗ National Cancer Institute
Cancer Terms Dictionary ↗ CDC
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This is a plain-language Healthway explanation, not an individual diagnosis. The meaning of a term can change with the clinical context in which it appears.