atrial fibrillation

English

Noun

atrial fibrillation (countable and uncountable, plural atrial fibrillations)

  1. (pathology) A cardiac arrhythmia (abnormal heart rhythm) that involves the two upper chambers (atria) of the heart.
    • 2024 February 13, “Understanding Your Heart Rate”, in Emory Healthcare‎[1]:
      The most common type of irregular heartbeat is atrial fibrillation or AFib. It is estimated that between three and six million people in the United States have AFib.

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