Atrial Flutter: Symptoms, Causes, Diagnosis & Treatment — Complete Guide
Updated: 3 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026
Quick Answer: What Is Atrial Flutter?
Atrial flutter is a heart rhythm disorder in which the atria, the heart's upper chambers, beat too quickly in a fast but organized rhythm. Many people have no symptoms, while others have a racing heart, chest pain or fainting. Because it can lead to AFib, heart failure or stroke, treatment includes medication, cardioversion and radiofrequency ablation.
What the research says
Whether to keep taking blood thinners after flutter ablation is still unsettled. Catheter ablation of typical atrial flutter restores a normal rhythm in about 95% of patients, which can lead to stopping anticoagulants. A meta-analysis of 8 observational studies (4,870 patients) found that anticoagulation did not significantly reduce clots or stroke after ablation (risk ratio 1.18, 95% CI 0.59–2.36; very low-certainty evidence), though the benefit grew in groups with more prior AFib — the authors call the evidence not robust. (Nunes-Ferreira et al., Pacing Clin Electrophysiol, 2021) [3]
Ablation is aimed at documented flutter, not used "just in case" in AFib. A meta-analysis of 1,476 AFib patients with no documented flutter found that adding flutter-line (cavotricuspid isthmus) ablation to standard AFib ablation did not help: recurrent AFib was 33.8% versus 27.1% without it (risk difference 0.07, 95% CI 0.01–0.13). (Waranugraha et al., Arrhythm Electrophysiol Rev, 2022) [4]
At a Glance: Atrial Flutter Summary
Topic | Key Facts |
What it is | A heart rhythm disorder (arrhythmia) in which the upper chambers (atria) beat too quickly — fast but organized, less chaotic than AFib |
Who gets it | Anyone, but risk rises with age, heart conditions, lung disease, and recent heart surgery |
Main cause | Changes in the heart's electrical system |
Typical resting rate | About 60 to 100 beats per minute — in atrial flutter, the atria beat far faster |
Common symptoms | Pounding heart, chest pain, fainting or near-fainting, shortness of breath, fatigue — or none at all |
Main risk factors | Heart failure, COPD, pulmonary embolism, congenital heart defect, older age, recent heart surgery |
Main complications | Atrial fibrillation (raises clot and stroke risk), heart failure, stroke, heart attack |
Key diagnosis tools | ECG/EKG, Holter monitor, event recorder, implantable loop recorder, echocardiogram, stress test, EP study |
Treatment options | Medicines; electrical or pharmacologic cardioversion; radiofrequency ablation |
Outlook | Treatable with medicines or heart procedures; untreated, it can lead to serious complications |
What Is Atrial Flutter?
Atrial flutter is a type of heart rhythm disorder, called an arrhythmia. In this condition, the heart's upper chambers — called the atria — beat too quickly.
Atrial flutter is similar to atrial fibrillation (AFib), but there is a key difference: in atrial flutter the heart rhythm is more organized and less chaotic than in AFib. Your heart's signals move too fast, but usually in a pattern — making the flutter rhythm "fast but organized" rather than random.
It is also possible for a person to have both atrial flutter and AFib at the same time or at different times. Atrial flutter may not cause any symptoms at all. But some people may feel a pounding, fast heartbeat and chest pain, and fainting or almost fainting can also happen. Treatment may include medicines and a heart procedure.
What are the symptoms of atrial flutter?
Atrial flutter is tricky partly because it can be silent. Some people have no symptoms, and the irregular heartbeat is found during a health checkup for another reason.
When symptoms do occur, they may include:
A pounding or racing feeling in the chest
Chest pain
Fainting or almost fainting
Shortness of breath
Feeling very tired
When to See a Doctor
If you feel like your heart is pounding, fluttering, skipping a beat, or beating too fast, make an appointment for a health checkup. You may be referred to a cardiologist — a doctor trained in heart diseases.
Get emergency medical care if you have chest pain, shortness of breath, or fainting. Always call 911 or your local emergency number if you think you might be having a heart attack.
What Causes Atrial Flutter?
Atrial flutter comes down to the heart's electrical system — the built-in wiring that controls every heartbeat. The movement of the heart's electrical signals is what makes the heart squeeze and pump blood. Usually, this process goes smoothly.
In atrial flutter, changes in the heart's electrical system cause the upper chambers to beat too quickly. The result is a heartbeat that is fast, but usually organized. Some health conditions or heart surgery can change how electrical signals move through the heart and bring on atrial flutter.
For context, the typical resting heart rate is about 60 to 100 beats a minute. In atrial flutter, the atria fire far faster than that — which is what produces the pounding or racing sensation many people feel.
Risk Factors: Who Gets Atrial Flutter?
Atrial flutter is more likely with certain health conditions, as well as with getting older and recent heart surgery. The main conditions are:
Risk Factor | What It Is |
Heart failure | The heart doesn't pump as well as it should |
COPD | Chronic obstructive pulmonary disease, a lung condition that blocks airflow |
Pulmonary embolism | A blood clot in the lungs |
Congenital heart defect | A heart condition present at birth |
In addition, two broad factors play a role: getting older and recent heart surgery.
What are the complications of atrial flutter?
The most important complication of atrial flutter is that it can lead to atrial fibrillation (AFib) — which in turn increases the risk of blood clots and strokes. Other complications include:
Heart failure
Stroke
Heart attack
Because of this chain — flutter → AFib → clots → stroke — detecting and treating atrial flutter early matters, even when it feels harmless.
How can atrial flutter be prevented with heart-healthy habits?
Preventing atrial flutter centers on heart-healthy habits, such as not smoking, eating healthy foods, staying active and controlling blood pressure, cholesterol and diabetes. Recommended steps include:
Don't smoke or use tobacco.
Eat healthy foods such as fruits, vegetables, and whole grains. Eat less salt and fewer saturated and trans fats.
Stay active and exercise at least 30 minutes a day on most days of the week.
Keep a healthy weight.
Lower and manage stress.
Control high blood pressure, high cholesterol, and diabetes.
Get good sleep. Adults should try to get 7 to 9 hours daily.
Your healthcare professional may also advise you to limit or avoid alcohol — too much alcohol can cause some types of irregular heartbeats. Ask your healthcare team how much alcohol, if any, is OK for you.
How Is Atrial Flutter Diagnosed?
To diagnose atrial flutter, a healthcare professional examines you and listens to your heart. A team member takes your blood pressure, and you'll be asked about your symptoms, health habits, and medical history.
Several tests may follow — each plays a specific role:
Test | What It Does |
Lab tests | Blood and urine tests look for conditions or substances affecting the heart; liver, thyroid, and kidney checks are common |
Electrocardiogram (ECG/EKG) | A quick test of the heart's electrical activity — sticky sensor patches on the chest (sometimes arms or legs) connect to a computer showing how fast or slow the heart beats |
Holter monitor | A portable ECG worn for a day or more, recording heart activity during daily life |
Event recorder | A portable ECG worn for up to 30 days or until symptoms occur; you press a button when symptoms strike |
Implantable loop recorder | Placed under the skin in the chest when symptoms are infrequent; constantly records and finds irregular rhythms |
Echocardiogram | Sound waves take pictures of the beating heart, showing its structure, valves, and blood flow |
Exercise stress test | Heart activity is checked while walking a treadmill or pedaling a bike; if you can't exercise, medicine simulates exercise; an echocardiogram may be done during the test |
CT scan of the lungs | Checks for a blood clot in the lungs, which may cause atrial flutter |
Electrophysiological (EP) study | Flexible tubes with sensors move through a blood vessel (usually in the groin) into the heart to find exactly where the incorrect signals start |
How is atrial flutter treated with medicines, cardioversion and ablation?
Treatment depends on your overall health and how severe your symptoms are. It may involve medicine or a heart procedure — sometimes both.
Medications
Your healthcare professional may prescribe medicines to achieve three goals:
Control the speed of the heartbeat
Restore the heart rhythm
Prevent blood clots if you also have AFib
Cardioversion: Resetting the Rhythm
If medicine doesn't control atrial flutter, a heart doctor may try to reset your heart rhythm using a procedure called cardioversion. It comes in two forms:
Electrical cardioversion. Paddles or patches on the chest send electric shocks to the heart to reset its rhythm. This is commonly used for people with unstable atrial flutter. After electrical cardioversion, you may need medicines to control your heart rhythm for the rest of your life.
Pharmacologic cardioversion. Medicines given through a vein or by mouth are used to reset the heart rhythm.
Cardioversion is usually done in a hospital as a scheduled procedure, but it may be done in emergency situations.
Radiofrequency Ablation
A heart doctor may suggest radiofrequency ablation if you keep having atrial flutter — though it may be used at other times too. Here's how it works:
Thin, flexible tubes called catheters carry heat energy into the heart.
The heat creates tiny scars in the heart tissue.
Heart signals can't pass through the scars — so the scars block the faulty electrical signals that cause the irregular heartbeat.
Studies have shown radiofrequency ablation to improve health-related quality of life for people with atrial flutter.
Frequently Asked Questions
What is atrial flutter?
Atrial flutter is a heart rhythm disorder (arrhythmia) in which the heart's upper chambers — the atria — beat too quickly. The rhythm is fast but usually organized, making it less chaotic than atrial fibrillation (AFib).
How is atrial flutter different from atrial fibrillation (AFib)?
In atrial flutter the heart rhythm is more organized and less chaotic than in AFib. A person can have both atrial flutter and AFib, and atrial flutter can actually develop into AFib — which is its most important complication.
What does atrial flutter feel like?
Symptoms may include a pounding or racing feeling in the chest, chest pain, fainting or almost fainting, shortness of breath, and feeling very tired. However, many people have no symptoms at all, and the irregular heartbeat is discovered during a checkup for another reason.
What causes atrial flutter?
Changes in the heart's electrical system cause atrial flutter. Some health conditions or heart surgery can alter how electrical signals move through the heart. The typical resting heart rate is 60 to 100 beats per minute, but in atrial flutter the upper chambers beat much faster.
Who is at risk of atrial flutter?
Risk factors include heart failure, COPD, a pulmonary embolism (blood clot in the lungs), a congenital heart defect, getting older, and recent heart surgery.
How is atrial flutter treated?
Treatment depends on overall health and symptom severity. Options include medicines that control heart rate, restore rhythm, or prevent blood clots; cardioversion (electrical shocks or medications to reset the rhythm); and radiofrequency ablation, where catheters use heat to create tiny scars that block the faulty signals — a treatment shown to improve quality of life for people with recurring flutter.
Can atrial flutter cause a stroke?
Atrial flutter itself doesn't directly cause a stroke, but it can lead to atrial fibrillation (AFib), which increases the risk of blood clots and strokes. Other complications include heart failure, heart attack, and stroke itself — which is why evaluation and treatment matter.
Conclusion
Atrial flutter may be quiet, but it should never be dismissed. This guide leaves you with three lessons:
Silent does not mean safe. Many people feel nothing — yet the fast atrial rhythm can quietly progress to AFib, raising the risk of blood clots and stroke.
Organized fast is not the same as chaotic fast. Atrial flutter's rhythm is more patterned than AFib's, and the two conditions can coexist — which is why precise diagnosis with an ECG, Holter, or event recorder matters.
The rhythm can be reset. Whether through medicines, electrical or pharmacologic cardioversion, or radiofrequency ablation, modern treatment can control or restore a normal heartbeat — and proven ablation can meaningfully improve quality of life.
From the first fluttering sensation to ablation and long-term heart-healthy habits, this guide covers the full path of living well with atrial flutter.
Disclaimer: This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.
Related Reading
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References
Mayo Clinic. Atrial flutter — Symptoms & causes. Accessed October 12, 2026. https://www.mayoclinic.org/diseases-conditions/atrial-flutter/symptoms-causes/syc-20352586
Mayo Clinic. Atrial flutter — Diagnosis & treatment. Accessed October 12, 2026. https://www.mayoclinic.org/diseases-conditions/atrial-flutter/diagnosis-treatment/drc-20572204
Nunes-Ferreira A, Alves M, Lima da Silva G, et al. Anticoagulation after typical atrial flutter ablation: systematic review and meta-analysis. Pacing Clin Electrophysiol. 2021;44(10):1701-1710. PMID 34409630. https://doi.org/10.1111/pace.14342
Waranugraha Y, Rizal A, Rohman MS, et al. Prophylactic cavotricuspid isthmus ablation in atrial fibrillation without documented typical atrial flutter: a systematic review and meta-analysis. Arrhythm Electrophysiol Rev. 2022;11:e10. PMID 35846424. https://doi.org/10.15420/aer.2021.37
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