Ask the doctor: How is atrial flutter different from atrial fibrillation?

Ask the doctor

How is atrial flutter different from atrial fibrillation?

Published: May, 2009

Q. What are the differences between atrial flutter and atrial fibrillation?

A. Atrial flutter and atrial fibrillation are abnormal rhythms involving the upper chambers of the heart (the atria). As such, they're both classified as supraventricular arrhythmias. Both cause the atria to beat far faster than they should. The big differences are in their causes and patterns.

To continue reading this article, you must log in.
  • Research health conditions
  • Check your symptoms
  • Prepare for a doctor's visit or test
  • Find the best treatments and procedures for you
  • Explore options for better nutrition and exercise
Learn more about the many benefits and features of joining Harvard Health Online »