Below is a list of some of the more common symptoms people may feel when in atrial flutter:
Some people have no symptoms.
Atrial flutter is more common in people with health conditions that have caused changes in the electrical system in their heart like:
However, atrial flutter can also happen without any of these or other health issues. When there are no underlying health issues, it’s called primary atrial flutter.
Atrial flutter is seen more often as we get older. It’s rare in children and young adults.
For many people there isn’t anything obvious that will trigger an episode of AF. For others, triggers can be:
Two other heart arrhythmias are closely related to atrial flutter (atrial tachycardia and atrial fibrillation). Some people can have two or all three of these arrhythmias at different times.
This rhythm is rarely dangerous, although it can make you feel unwell. The most serious complication is a blood clot (thrombus) forming in your heart if the flutter goes on for long periods of time.
A blood clot can form inside the atria because, at a fast heart rate such as 300 bpm, the blood isn’t emptying well from these chambers. The blood then pools in the chamber and may clot.
If this clot, or a part of it, breaks off and travels in your bloodstream, it may travel to your brain and cause a stroke (which can cause brain cells to die resulting in brain damage), to your lungs and cause a pulmonary clot, or it can block the blood flow to other body organs.
Also, if your heart is allowed to beat at more than 100 bpm for weeks or months, the heart muscle may become enlarged and/or weakened. This is not always a permanent problem. It may reverse itself once the heart rate returns back to normal.
Current as of: May 3, 2022
Author: Cardiac Arrhythmia Services, Alberta Health Services
This material is not a substitute for the advice of a qualified health professional. This material is intended for general information only and is provided on an "as is", "where is" basis. Although reasonable efforts were made to confirm the accuracy of the information, Alberta Health Services does not make any representation or warranty, express, implied or statutory, as to the accuracy, reliability, completeness, applicability or fitness for a particular purpose of such information. Alberta Health Services expressly disclaims all liability for the use of these materials, and for any claims, actions, demands or suits arising from such use.