Atrial fibrillation or “AFib” is the most common type of cardiac arrhythmia. It occurs when erratic electrical signals cause the atria (the heart’s upper chambers) to contract quickly and irregularly. Blood doesn’t pump into the ventricles (lower chambers) as it should, so it pools in the atria.
AFib can cause chest pain or even heart failure, but sometimes there are no symptoms. It can happen sporadically or regularly/long-term. Regardless, AFib can increase the risk of stroke, so it should be taken very seriously.