The heart has 4 chambers. It has 2 upper chambers (atria) and 2 lower chambers (ventricles). Electrical signals regulate the heart beat. The signals also help the atria and ventricles work together in the same rhythm. The blood from the atria is pushed into the ventricles and leaves the heart to circulate to the rest of the body.

Atrial flutter is a type of abnormal fast beating (arrhythmia) in the atria. These fast beats make it difficult for the atria to push all the blood into the ventricles. As a result, the ventricles push less blood through the body.

Atrial flutter may be an acute or chronic disorder that comes and goes. Atrial flutter is not usually life-threatening when it is treated. However, it may increase your risk of developing blood clots and a stroke.

Anatomy of the Heart
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Atrial flutter may be caused by the following:

  • Coronary artery disease (CAD)
  • Heart surgery—atrial flutter is most common during the first few weeks after open-heart surgery
  • Disease in other parts of the body that affects the functioning of the heart such as the lungs
  • Using substances such as caffeine, alcohol, diet pills, or certain types of prescription or over the counter medication that affect the electrical impulses of the heart
  • Stress and anxiety

Risk Factors

Factors that may increase your chances of atrial flutter:

Atrial flutter is more likely to develop in older adults.


Atrial flutter does not always produce symptoms. However, symptoms, when present, may include:

  • A fluttering or tremor-like feeling in the chest
  • Rapid heart beat or pounding sensation in the chest—palpitations
  • Pressure or discomfort in the chest
  • Shortness of breath
  • Anxiety
  • Lightheadedness or fainting


Your doctor will ask about your symptoms and medical history. A physical exam will be done. Your doctor may also recommend that you see a cardiologist or arrhythmia specialist. This type of physician may be found in a larger hospital.

Your doctor may need pictures of your heart and information about how it functions. This can be done with:


The goal of treating atrial flutter is to slow down the electrical impulses that are sent from the atria to the ventricles. Treatment aims at restoring normal rhythm and preventing future episodes. Talk with your doctor about the best treatment plan for you. Treatment options include the following:


Medication may be given to slow the rapid heart rate and change the atrial flutter to a normal rhythm. These medications may include:

  • Beta-blockers
  • Digoxin
  • Adenosine
  • Nonhydropyridine calcium channel antagonists

Other medications called antiarrhythmics may be used to change the rhythm back to normal. They may also help your heart maintain a normal rhythm.


An external defibrillator is applied to the chest. It uses an electrical current to shock the heart back to its normal rhythm.

Ablation Therapy

Ablation can be performed during an electrophysiological study (EP) study on patients with recurring atrial flutter that cannot be controlled with medications. Using the same catheters, an area of the heart where an abnormal electrical rhythm is generated can be destroyed. This can be a cure for atrial flutter.

Blood Thinners

Blood thinners are an important therapy to prevent blood clots that can cause strokes or other serious complications. They can be used on those who have recurrent atrial flutter. They can also be used on those who are at an increased risk.


To help reduce your chances of atrial flutter:

  • Reduce or eliminate your use of caffeine, stimulants, alcohol, nicotine, certain medications, or recreational drugs
  • Obtain treatment for any other heart or lung disease
  • Reduce your levels of stress and anxiety
  • Check with your doctor before taking any new medications, herbs, or supplements

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