Left Atrial Appendage Closure: Procedure, Benefits, Risks and Recovery
Updated: 2 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026
Quick Answer: What is left atrial appendage closure?
Left atrial appendage (LAA) closure is a surgical or minimally invasive procedure that seals a small pouch in the heart's left atrium where blood can collect and form clots in people with atrial fibrillation. Closing it can reduce stroke risk but does not treat Afib or eliminate all stroke risk. It is often done by catheter through a groin vein. [5]
What the research says
In a network meta-analysis of randomized trials, LAA closure showed similar stroke prevention and safety to oral anticoagulants. Across 7 trials (73,199 patients), the risk of stroke or systemic embolism did not differ significantly for LAA closure versus vitamin K antagonists (OR 0.92; 95% CI 0.62–1.50) or versus direct oral anticoagulants (OR 1.11; 0.71–1.73). Major bleeding was similar to DOACs (OR 0.92; 0.58–1.46), although bleeding risk was significantly lower with LAA closure after procedural bleeding was excluded, and all-cause death was lower than with vitamin K antagonists (OR 0.70; 0.53–0.91); the authors called for prospective confirmation (Oliva et al., J Am Heart Assoc, 2024). [3]
A leak around the closure device was linked to more thromboembolic events, which is why follow-up imaging matters. A meta-analysis of 11 studies (54,279 patients) found that peri-device leak after LAA closure was associated with a higher risk of the composite of stroke, transient ischemic attack or systemic embolism (OR 1.63; 95% CI 1.06–2.52; P = 0.03), with no significant differences in all-cause or cardiovascular mortality, ischemic stroke, TIA or device-related thrombus (Mostafa et al., Am J Cardiol, 2023). [4]
What is the left atrial appendage?
The left atrial appendage, or LAA, is a small sac in the muscle wall of the left atrium, the upper-left chamber of the heart. It does not have a necessary role in the heart’s basic pumping function, and the heart can continue its work when the LAA is closed. [5]
When the heart rhythm is organized, the atria contract with each heartbeat and help move blood into the ventricles. Afib disrupts the normal electrical signals that coordinate this movement. The atria may beat fast and chaotically instead of squeezing blood forward in an orderly way.
Because the LAA is a pouch, blood can collect there during Afib and form a clot. If a clot leaves the LAA and enters the bloodstream, it can travel to the brain and cause a stroke. [5]
What does left atrial appendage closure treat?
LAA closure is intended to reduce the stroke risk associated with Afib in selected people. It does not treat the abnormal rhythm itself. A person may still need a separate plan for managing Afib. [5]
The procedure may be considered when the risk of clots is increased and long-term blood-thinner treatment is difficult, unsuitable or not acceptable after a careful discussion. Concerns about anticoagulants can include bleeding risk, medication intolerance, cost, frequent blood testing for some medicines, food interactions for warfarin, or difficulty maintaining the desired clotting time. [5]
The decision is not based on one concern alone. The care team weighs stroke risk, bleeding risk, the person’s medical history, the anatomy of the LAA and the likely benefits and limitations of each option.
Who might be considered for LAA closure?
People with Afib and an increased risk of stroke may be considered for LAA closure, especially when long-term anticoagulation is not a good fit. The procedure is not right for everyone, and the evaluation is individualized. [5]
A team may review the rhythm diagnosis, whether valve disease is present, previous bleeding, other health conditions and current medicines. Imaging helps determine whether the LAA can be reached and which size or type of closure method may fit.
LAA closure can be performed during heart surgery for another reason, such as surgery related to coronary artery disease or valve disease. It can also be performed as a minimally invasive catheter procedure. [5]
What types of LAA closure are used?
The methods fall into three broad groups. Some devices block the opening of the LAA. Others clamp the base of the pouch, while some use a band or suture loop to close it. [5]
Method | General description | When it may be used |
Opening-blocking device | A device is positioned at the LAA opening to keep clots inside the pouch. | Often through a minimally invasive catheter procedure. |
Surgical clamp or excision | The base of the LAA is clamped or the pouch is removed or closed. | May occur during another heart surgery. |
Band or suture loop | A band or loop closes off the LAA from outside or around its base. | Used in selected surgical or minimally invasive approaches. |
The method and device are selected by the treating team. A general description cannot determine which option is safe or appropriate for one person.
How should someone prepare for LAA closure?
Before a procedure, the team may use a transesophageal echocardiogram, cardiac CT or both to measure the LAA. The appendage varies in size and shape from person to person, so the measurements help the team choose a suitable device and size. [5]
Some teams may use three-dimensional printing as part of device planning. The person will also receive instructions about fasting and the type of anesthesia planned. [5]
Ask the care team how to handle each prescription, over-the-counter medicine and supplement before the procedure. Do not stop an anticoagulant, aspirin or any other medicine unless the prescribing team gives clear instructions.
What happens during a catheter-based procedure?
For a minimally invasive approach, the provider inserts a catheter into a vein near the groin. The catheter is advanced to the right atrium, and a passage is created between the right and left atria so the catheter can reach the LAA. [5]
The provider moves the catheter through this passage to the LAA, confirms the needed device size and places the closure device over the LAA opening. The device is intended to seal the opening so clots in the pouch cannot leave it. The catheter is then removed. [5]
The temporary passage between the atria usually heals within about six months. Fluoroscopy, transesophageal echocardiography and intracardiac ultrasound may guide the provider during the procedure. [5]
What happens during surgical closure?
If LAA closure is performed during heart surgery for another condition, the surgeon may close the area with sutures or staples, clamp the base or remove the appendage. [5]
Recovery in this situation depends on the other heart operation as well as the LAA closure. The team will explain the expected hospital stay, pain control, activity plan and follow-up.
What happens after the procedure?
After a catheter-based procedure, some people may stay overnight and have a TEE within 48 hours. Recovery after surgery may require a longer hospital stay because of the other operation. [5]
The care team checks for access-site or surgical changes, monitors the heart rhythm and confirms the next medication and imaging steps. The instructions given at discharge take priority over any general explanation here.
What medicines may be needed after device closure?
The body needs time for tissue to form around a closure device. A medication plan may therefore continue after the procedure even though the long-term goal is to reduce the need for anticoagulation in selected people.
The described plan after device placement is an anticoagulant plus aspirin for 45 days. The person may then stop the anticoagulant and switch to clopidogrel plus aspirin for six months, with aspirin possibly continuing longer.
This is not a self-management schedule. The treating team decides which medicines are appropriate and exactly when they can be changed. Do not stop an anticoagulant, aspirin or antiplatelet medicine because symptoms improve or a general timeline appears to apply.
What follow-up tests are needed?
A TEE is performed within about 48 hours in some cases and again at a follow-up visit around 45 days after the procedure. The 45-day study checks whether the LAA is fully blocked. [5]
If the LAA is not fully blocked, the team may continue the anticoagulant and arrange another TEE and visit after six months. Once the LAA is blocked, annual follow-up is described. [5]
Follow-up point | Main purpose |
Within about 48 hours, when planned | Check the heart and closure result soon after the procedure. |
Around 45 days | See whether the LAA is fully blocked and guide the next medication decision. |
Around six months, if closure is incomplete | Recheck the opening and reassess the medication plan. |
Annually after confirmed closure | Continue longer-term clinical follow-up. |
The exact schedule can vary. Keep every appointment and ask the care team what each test is checking.
What are the potential benefits?
For selected people, LAA closure can reduce stroke risk related to Afib and may reduce or end the need for long-term blood thinners when the care team determines that is safe. [5]
It can also be performed during another heart operation, avoiding a separate procedure for some patients. A minimally invasive catheter approach may offer another option for people who are not having open heart surgery. [5]
These potential benefits must be balanced against the procedure’s risks, the need for medication during healing and the fact that LAA closure does not treat Afib itself.
What are the risks and complications?
Possible complications include a problem with the device, a reaction to anesthesia, bleeding, chest pain, cardiac arrest, abnormal heart rhythm, infection, pericardial effusion and stroke.
The type of procedure changes the risk profile. A catheter-based procedure has different access-site and device considerations than surgery performed through an open-heart operation. The team can explain which complications are most relevant to the planned method.
Possible issue | What it may involve |
Device problem | The closure device may not work as intended or may need assessment. |
Bleeding | Bleeding can occur at an access site or in connection with the procedure. |
Abnormal heart rhythm | The heart rhythm may change and require evaluation. |
Infection | Infection can occur after an invasive procedure. |
Pericardial effusion | Fluid can collect around the heart and may require urgent assessment. |
Stroke | Stroke remains a possible complication and LAA closure does not remove all stroke risk. |
Chest pain or cardiac arrest | These symptoms require immediate medical attention. |
No procedure prevents every stroke or complication. Ask the care team how it monitors and manages the specific risks of the chosen approach.
How successful is LAA closure?
Reported findings link suture closure with a 40% decrease in blood-clot risk, clip or surgical excision with a decrease above 90%, and device studies with an 80% decrease in strokes. Some devices have reported placement rates above 95%.
These numbers describe study findings associated with particular methods or devices. They are not a guarantee for one person, and no approach eliminates stroke risk. Results may depend on the anatomy, procedure, device, medical history and follow-up.
What is recovery like?
Recovery depends on whether closure was performed through a catheter or during open heart surgery. After a minimally invasive catheter procedure, some people may be able to go home the next day. Recovery after surgery depends largely on the other operation performed.
The early period may include overnight observation, a TEE, medication management and monitoring for symptoms or changes at the access or surgical site. The care team will explain when normal activities can resume and what restrictions apply.
Do not change medicines, remove dressings or judge whether healing is complete based only on this article. Follow the plan provided by the treating team.
When should someone call the care team?
Contact the healthcare provider for fever or other signs of infection, an abnormal heart rhythm, chest pain or shortness of breath. These symptoms can have many causes, and a clinician should decide what evaluation is needed. [5]
Seek urgent medical help for severe chest pain, major breathing difficulty, fainting, sudden weakness or other rapidly worsening symptoms. Do not wait for a routine appointment when symptoms are severe.
What questions should you ask before left atrial appendage (LAA) closure?
Topic | Questions to discuss |
Stroke risk | How does my Afib and medical history affect my stroke risk? |
Medication | Why is LAA closure being considered instead of, or alongside, an anticoagulant? |
Anatomy | What did my TEE or cardiac CT show about the LAA? |
Method | Would a catheter-based or surgical approach be used, and why? |
Device | How will the team choose the device type and size? |
Anesthesia | What type of anesthesia is planned? |
Hospital stay | How long might I stay after this approach? |
Medicines afterward | Which anticoagulant, aspirin or antiplatelet medicines will I need, and for how long? |
Follow-up | When will the next TEE or other imaging occur? |
Incomplete closure | What happens if the LAA is not fully blocked at follow-up? |
Afib care | How will the closure procedure fit with my separate Afib treatment plan? |
Warning signs | Which symptoms should prompt a call, urgent evaluation or emergency care? |
Conclusion: Weigh stroke prevention, medicines and follow-up with your cardiology team
Left atrial appendage closure seals or removes a pouch where blood clots can form during Afib. In selected people, it may lower the risk of an Afib-related stroke and reduce the need for long-term blood thinners, but it does not treat Afib itself and does not eliminate all stroke risk. [5]
The procedure may be performed during heart surgery or through a catheter inserted near the groin. Imaging helps plan the treatment and follow-up testing confirms whether the LAA is fully blocked. Medication may still be needed while tissue forms around a device. [5]
The best choice depends on the person’s heart rhythm, stroke and bleeding risks, LAA anatomy, medical history and treatment goals. A cardiology team can explain the expected benefits, limitations, medication plan, warning signs and follow-up schedule. [5]
Frequently Asked Questions
What is left atrial appendage closure?
Left atrial appendage closure is a procedure that seals or closes the opening of the left atrial appendage, a small pouch in the left atrium. Closing the pouch can reduce the chance that clots formed there enter the bloodstream.
Why is LAA closure considered for Afib?
Afib can allow blood to collect in the LAA and form clots. In selected people, closing the LAA may reduce the stroke risk linked to those clots.
Does LAA closure cure atrial fibrillation?
No. LAA closure targets the pouch where clots may form. It does not treat the abnormal electrical rhythm of Afib, so a separate rhythm-care plan may still be needed.
Is LAA closure surgery?
LAA closure can be. Some people have the LAA closed during heart surgery for another condition. Others have a minimally invasive catheter procedure that places a closure device.
How is a catheter-based LAA closure performed?
A provider inserts a catheter into a vein near the groin, advances it to the right atrium, creates a passage to the left atrium, guides it to the LAA and places a device over the opening. Imaging helps guide and check the procedure.
What tests are done before LAA closure?
A transesophageal echocardiogram, cardiac CT or both may measure the LAA and help the team choose the device and size. The team also provides fasting and anesthesia instructions.
Will I still need blood thinners after LAA closure?
Often, medicine is still needed for a period after device placement while tissue forms around the device. A described plan includes an anticoagulant and aspirin for 45 days, followed by clopidogrel and aspirin for six months, with aspirin possibly continuing longer. The treating team must set and change the actual plan.
How long does recovery take?
Recovery depends on the approach. Some people having a catheter-based procedure may go home the next day. Recovery after surgical closure depends on the other heart operation.
When is follow-up imaging done?
A TEE may be done within about 48 hours and again around 45 days. If the LAA is not fully blocked, another TEE and visit may occur after six months. Annual follow-up is described after confirmed closure.
What are the risks of LAA closure?
Possible risks include device problems, anesthesia reaction, bleeding, chest pain, cardiac arrest, abnormal heart rhythm, infection, pericardial effusion and stroke.
Can LAA closure prevent every stroke?
No. It may reduce stroke risk associated with Afib in selected people, but no procedure eliminates every stroke risk and LAA closure does not treat Afib itself.
How successful is LAA closure?
Reported findings include a 40% decrease in blood-clot risk with suture closure, a decrease above 90% with clip or surgical excision, an 80% decrease in strokes in device studies and placement rates above 95% for some devices. These figures are not individual guarantees.
What symptoms should prompt a call after the procedure?
Contact the care team for fever or infection signs, abnormal heart rhythms, chest pain or shortness of breath. Seek urgent help for severe or rapidly worsening symptoms.
Related guides
Related guides on left atrial appendage closure cover atrial fibrillation, atrial fibrillation with RVR, stroke and heart arrhythmia.
Related Reading
Maze Procedure for AFib: How It Works, Success Rate and Recovery explains the maze procedure for AFib.
References
American College of Cardiology. Left Atrial Appendage Closure. CardioSmart. Last edited November 30, 2023. https://www.cardiosmart.org/topics/atrial-fibrillation/preventing-stroke/other-options-to-prevent-stroke
Landmesser U, Skurk C, Tzikas A, et al. Left atrial appendage closure for stroke prevention in atrial fibrillation: current status and perspectives. Eur Heart J. 2024;45(32):2914-2932. PMID 39027946. https://doi.org/10.1093/eurheartj/ehae398
Oliva A, Ioppolo AM, Chiarito M, et al. Left atrial appendage closure compared with oral anticoagulants for patients with atrial fibrillation: a systematic review and network meta-analysis. J Am Heart Assoc. 2024;13(16):e034815. PMID 39119987. https://doi.org/10.1161/JAHA.124.034815
Mostafa MR, Eid MM, Abuelazm M, et al. Meta-analysis of the outcomes of peri-device leak after left atrial appendage closure. Am J Cardiol. 2023;204:325-332. PMID 37572568. https://doi.org/10.1016/j.amjcard.2023.07.102
Cleveland Clinic. Left Atrial Appendage Closure. Cleveland Clinic. Last updated November 27, 2024. https://my.clevelandclinic.org/health/treatments/17167-left-atrial-appendage--closure
Disclaimer
This article is for general educational purposes and is not a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified healthcare professional with any questions about a medical condition or treatment.
Do not start, stop or change an anticoagulant, aspirin or antiplatelet medicine based on this article. The treating cardiology team should provide the individual plan, and emergency services should be contacted for severe chest pain, major breathing difficulty, fainting or sudden weakness.
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