atrial fibrillation

noun

Meaning

An irregular and often rapid heart rate that occurs when the heart's upper chambers beat out of sync with the lower chambers.

Examples

  • The cardiologist diagnosed him with atrial fibrillation after reviewing his EKG results.
  • Patients suffering from atrial fibrillation often report feeling palpitations or shortness of breath.

Synonyms: AFib, irregular heartbeat, arrhythmia, cardiac dysrhythmia