10 Things to Know About Atrial Fibrillation
An Irregular Heartbeat

1. It’s the most common form of arrhythmia.

An arrhythmia is any type of abnormal heart rhythm. In an arrhythmia, the heart can beat too fast, too slow, or in an irregular pattern. Atrial fibrillation (afib) is an arrhythmia caused by the upper heart chambers (the atria) beating too fast and irregularly, out of time with the two lower chambers (the ventricles).

Was this helpful? (331)

Medically Reviewed By: William C. Lloyd III, MD, FACS | Last Review Date:

© 2018 Healthgrades Operating Company, Inc. All rights reserved. May not be reproduced or reprinted without permission from Healthgrades Operating Company, Inc. Use of this information is governed by the Healthgrades User Agreement.

View Sources

Medical References

  1. Catheter Ablation. Cleveland Clinic. http://my.clevelandclinic.org/services/heart/services/ablation
  2. What Is Atrial Fibrillation? National Heart, Lung, and Blood Institute. http://www.nhlbi.nih.gov/health/health-topics/topics/af/
  3. Living With Atrial Fibrillation. National Heart, Lung, and Blood Institute. http://www.nhlbi.nih.gov/health/health-topics/topics/af/livingwith.html
  4. Prevention Strategies for Atrial Fibrillation (AFib or AF). American Heart Association. http://www.heart.org/HEARTORG/Conditions/Arrhythmia/AboutArrhythmia/Prevention-Strategies-for-Atrial-Fibrillation-AFib-or-AF_UCM_423784_Article.jsp