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