What is Atrial Fibrillation (AFib or AF)?

couple looking at a tablet screen

Atrial fibrillation (also called AFib or AF) is a quivering or irregular heartbeat (arrhythmia) that can lead to blood clots, stroke, heart failure and other heart-related complications. At least 2.7 million Americans are living with AFib.

Here’s how patients have described their experience:

“My heart flip-flops, skips beats, and feels like it’s banging against my chest wall, especially if I’m carrying stuff up my stairs or bending down.”
“I was nauseated, light-headed, and weak. I had a really fast heartbeat and felt like I was gasping for air.”
“I had no symptoms at all. I discovered my AF at a regular check-up. I’m glad we found it early.”

What happens during AFib?

atrial fibrillation

Normally, your heart contracts and relaxes to a regular beat. In atrial fibrillation, the upper chambers of the heart (the atria) beat irregularly (quiver) instead of beating effectively to move blood into the ventricles.

If a clot breaks off, enters the bloodstream and lodges in an artery leading to the brain, a stroke results. About 15–20 percent of people who have strokes have this heart arrhythmia. This clot risk is why patients with this condition are put on blood thinners.

Even though untreated atrial fibrillation doubles the risk of heart-related deaths and is associated with a 5-fold increased risk for stroke, many patients are unaware that AFib is a serious condition.

Watch an animation of atrial fibrillation.

According to the 2009 “Out of Sync” survey:

  • Only 33% of AF patients think atrial fibrillation is a serious condition
  • Less than half of AF patients believe they have an increased risk for stroke or heart-related hospitalizations or death

AFib Treatment Saves Lives & Lowers Risks

If you or someone you love has atrial fibrillation, learn more about what AFib is, why treatment can save lives, and what you can do to reach your goals, lower your risks and live a healthy life.

If you think you may have atrial fibrillation, here are your most important steps:

  1. Know the symptoms
  2. Get the right treatment
  3. Reduce risks for stroke and heart failure

We’re here to help you live your healthiest life!


Sponsor

The American Heart Association’s AFib content and awareness campaign is made possible with a grant from BMS-Pfizer

The American Heart Association’s AFib content and awareness campaign is made possible with a grant from BMS-Pfizer.