Medical Dictionary

atrial fibrillation

noun

medical Definition of atrial fibrillation

:very rapid uncoordinated contractions of the atria of the heart resulting in a lack of synchronism between heartbeat and pulse beat
  • If you're experiencing chest pain, palpitations, lightheadedness or shortness of breath, you could have atrial fibrillation (AF), a condition in which the heart's upper chambers (atria) “quiver.”
  • —Abigail L. CuffeyWoman's Day10 Feb. 2010
abbreviation AF called also A-fib, auricular fibrillation

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