Atrial fibrillation

Atrial fibrillation: Atrial fibrillation is an irregular fast rhythm originating from the upper chambers of the heart (atria). Due to the very fast rate of the order of 400-600/minute, the upper chambers cannot contract properly and rather stand still in atrial fibrillation. Hence there is a risk of clot formation in the upper chambers. These clots can migrate to other parts of the body through the bloodstream and obstruct important blood vessels, causing diseases like stroke (with paralysis of parts of the body).