Is there also atrial fibrillation without a cause? | Causes of atrial fibrillation

Is there also atrial fibrillation without a cause?

Atrial fibrillation can occur without an identifiable cause, this is called idiopathic or primary atrial fibrillation. Approximately 15 to 30% of people who suffer from atrial fibrillation have atrial fibrillation without any identifiable cause. The people affected are heart healthy and there is no detectable cardiac cause for the cardiac arrhythmia.