The exact cause of atrial fibrillation is unknown, but it's more common with age and affects certain groups of people more than others.
Atrial fibrillation is a condition that causes an irregular and often fast heartbeat.
Symptoms of atrial fibrillation include heart palpitations, dizziness and shortness of breath.
It's not clear what causes atrial fibrillation, but it's common in people with other heart conditions.
Treatments for atrial fibrillation include medicines to control your heartbeat and thin your blood.
Page last reviewed: 24/04/2018
Next review due: 24/04/2021