Left Atrial Appendage Occlusion (LAAO) Procedure
The Structural Heart team at the Swedish Heart & Vascular Institute (SHVI) offers several options for left atrial appendage closure (also called left atrial appendage occlusion), including:
- The WATCHMAN™ Device
- LARIAT® Suture Delivery Device
- AtriClip® Left Atrial Exclusion System
Your doctor will talk with you about these procedures. Together you will choose the procedure that is the best option for you.
Closing the Left Atrial Appendage
The WATCHMAN Device: The U.S. Food and Drug Administration approved the WATCHMAN device as a permanent implant to plug the opening to the left atrial appendage. Once in place, it blocks blood from entering the sac. This device has been shown to be as good as blood thinners for preventing stroke in patients with atrial fibrillation. Your doctor will insert the device using a catheter inserted into a vein in your groin. The procedure takes about one hour. Patients typically spend one night in the hospital after the procedure.
Watchman device positioned in the left atrial appendage.
LARIAT Suture Delivery Device: A cardiologist uses the LARIAT device in a catheter-based procedure (medical procedure that uses a catheter to deliver instruments and devices that are used to correct a medical condition) to implant a suture (thread-like material used to sew together edges of tissue) around the outside of the opening of the left atrial appendage. Like a cowboy’s rope lariat, the suture can be tightened. In this case, it closes off the opening to the left atrial appendage and stops the blood flow. The procedure takes about two hours. Patients typically spend one night in the hospital after the procedure.
AtriClip LAA Exclusion System: A heart surgeon uses a minimally invasive procedure to implant the AtriClip device on the outside of the opening to the left atrial appendage. This permanently clamps the opening closed and stops the flow of blood between the left atrium and the sac. The procedure lasts about one hour. Patients typically spend one or two nights in the hospital after the procedure.
For more information about this procedure, go to Swedish Cardiac Surgery>
Atrial Fibrillation and Stroke Risk
Your heart’s electrical system sends signals to the heart muscles to make them contract and relax in a regular rhythm. The contracting and relaxing process moves blood from one chamber to next. If your heart rhythm is irregular (arrhythmia), your heart is less efficient and blood does not move easily from one chamber to the next.
When an arrhythmia occurs in the top chambers of the heart (the right and left atrium), it is called atrial fibrillation. If you have atrial fibrillation, your atria quiver (fibrillate), instead of beating regularly.
Symptoms of atrial fibrillation may include:
Pulse that feels rapid, racing, pounding, fluttering or too slow
Pulse that feels regular or irregular (arrhythmia)
Sensation of feeling the heart beat (palpitations)
Shortness of breath while lying down
Feeling faint (syncope)
Individuals with coronary heart disease, heart failure, structural heart defects, rheumatic heart disease or pericarditis (inflammation of the tissue surrounding the heart) are more susceptible to atrial fibrillation.Because atrial fibrillation causes the heart to quiver instead of beating forcefully and regularly, blood may get left behind in the atrium. When blood doesn’t move around, it can form blood clots. There is a risk that those blood clots will travel from the heart to the brain and cause a stroke.
Patients with atrial fibrillation are five times more likely to have a stroke than individuals who do not have atrial fibrillation. That is why many individuals with atrial fibrillation take blood thinners. These medicines have their own risks, including increased risk of uncontrolled internal or external bleeding, drug interactions and kidney and liver issues.
More than 90 percent of blood clots in patients with atrial fibrillation form in the left atrial appendage — a small, ear-shaped sac on the left atrium (the upper left chamber of the heart). In some cases, closing off the left atrial appendage can help prevent blood clots and may even reduce the need for blood thinners. This is especially beneficial to individuals who are not able to take blood thinners.