Atrial Fibrillation

Posted by on March 4, 2011 under Diseases and Conditions | Be the First to Comment

Atrial fibrillation , or AF, is the most common arrhythmia . An arrhythmia is a problem with the speed or rhythm of the heartbeat. A disorder in the heart’s electrical system causes AF and other types of arrhythmia.

AF occurs when rapid, disorganized electrical signals in the heart’s two upper chambers, called the atria , cause them to contract very fast and irregularly (this is called fibrillation). As a result, blood pools in the atria and isn’t pumped completely into the heart’s two lower chambers, called Read more of this article »