What IsAtrial Fibrillation (AF)

Atrial Fibrillation (also called AF or A Fib) is a common heart rhythm disorder caused by a problem in the conduction of electrical impulses in the upper chambers, or atria, of the heart. A Fib and other rapid heartbeats that arise in the atria, or in the juncture between the atria and the lower chambers (ventricles) are called “supraventricular tachycardias.” More than 2
million people in the U.S. have A Fib, and about 160,000 new cases are diagnosed each year. A Fib is uncommon among young people, although it can occur in people of any age. The likelihood of developing the condition, however, increases as we get older. After age 65, between 3 percent and 5 percent of people have atrial fibrillation. Approximately 9 percent of people who are age 80 or older have the condition.