Why is it important to treat it?
Because it can give rise to blood clots (thromboses) which, once in circulation, risk reaching the brain and causing brain ischaemia or stroke. Furthermore, cardiovascular mortality is greater in those with atrial fibrillation compared to those who are healthy and because quality of life is very affected by it. Furthermore, persistent atrial fibrillation alters the geometry of the left atrium to the point that the arrhythmia tends not to disappear but to self-perpetuate.
Finally, recent studies have shown how atrial fibrillation increases the risk of heart failure by 500% and how arrhythmia affects - still in high percentage - other noncardiac pathologies, beginning from chronic kidney failure (+60%) and peripheral vasculopathy (+30%).