What is Atrial Fibrillation, Afib ?

Atrial fibrillation is a complex arrhythmia (abnormal heart rhythm) affecting the upper chambers of the heart (the atria) primarily. During atrial fibrillation, the atria beat very rapidly (over 300 beats per minute), and much of the pumping activity of this portion of the heart is lost.  Additionally it drives the main pumping chambers of the heart (the ventricles) rapidly, and while the ventricles are unable to go as fast as the atria, pulse rates over 150 beats per minute are not uncommon.

Read More