Meaning of the word "atrial fibrillation" in English

What does "atrial fibrillation" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

atrial fibrillation

US /ˈeɪ.tri.əl ˌfɪb.rəˈleɪ.ʃən/
UK /ˈeɪ.tri.əl ˌfɪb.rəˈleɪ.ʃən/

Noun

a common type of irregular heartbeat (arrhythmia) that causes the atria (upper chambers) of the heart to beat very rapidly and irregularly

Example:
He was diagnosed with atrial fibrillation after experiencing palpitations.
Medication can help manage the symptoms of atrial fibrillation.