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Left Atrial Appendage Closure: Before Your Procedure

Inside view of heart with catheter guided to heart through blood vessel, and detail of left atrial appendage, catheter, and location of device.

What is a left atrial appendage closure?

The left atrial appendage (LAA) is a small sac or pouch in the left atrium. The atrium is an upper chamber of the heart.

When you have atrial fibrillation (say "AY-tree-uhl fih-bruh-LAY-shun"), a type of irregular heartbeat, the heart's upper chambers quiver, or fibrillate. This can lead to blood clots in the left atrium. Most of these clots form in the LAA, where the blood pools. If a clot moves out of the heart and travels to the brain, it may cause a stroke.

A left atrial appendage closure is a procedure to close off the LAA. The procedure can help prevent a blood clot from moving out of the LAA. But it can't prevent a clot from forming in other areas of the left atrium.

Closing the LAA won't affect how your heart works. Your heart will still pump blood normally.

You may be asleep for the procedure, or you may get a sedative to help you relax. Your doctor makes a small cut in your groin. A thin flexible tube (catheter) with tools inside it is put inside your blood vessel and carefully guided to your heart. Your doctor moves the tip of the catheter to the LAA and places a small device inside it. The device expands and closes off the opening. It stays inside your heart. The catheter is then removed. In time, your heart will heal around the device. A layer of heart tissue will help seal off the LAA.

You may stay in the hospital for at least 1 night.

How do you prepare for the procedure?

Procedures can be stressful. This information will help you understand what you can expect. And it will help you safely prepare for your procedure.

Preparing for the procedure

  • Be sure you have someone to take you home. Anesthesia and pain medicine will make it unsafe for you to drive or get home on your own.
  • Understand exactly what procedure is planned, along with the risks, benefits, and other options.
  • Tell your doctor ALL the medicines and natural health products you take. Some may increase the risk of problems during your procedure. Your doctor will tell you if you should stop taking any of them before the procedure and how soon to do it.
  • If you take a blood thinner (other than aspirin), ask your doctor if you should stop taking it before your procedure. Make sure that you understand exactly what your doctor wants you to do. These medicines increase the risk of bleeding.
  • You may have a test before the procedure. This may be a CT scan.
  • Make sure your doctor and the hospital have a copy of your advance care plan. If you don't have one, you may want to prepare one. It lets others know your health care wishes. It's a good thing to have before any type of surgery or procedure.

What happens on the day of the procedure?

  • Follow the instructions exactly about when to stop eating and drinking. If you don't, your procedure may be cancelled. If your doctor told you to take your medicines on the day of the procedure, take them with only a sip of water.
  • Follow your doctor's instructions about when to bathe or shower before your procedure. Do not apply lotions, perfumes, deodorants, or nail polish.
  • Do not shave the surgical site yourself.
  • Take off all jewellery and piercings. And take out contact lenses, if you wear them.

At the hospital or surgery centre

  • Bring a picture ID.
  • You will be kept comfortable and safe by your anesthesia provider. The anesthesia may make you sleep. Or it may just numb the area being worked on.
  • The procedure will take about 1 hour.

After the procedure

  • Pressure will be applied to the groin area where the catheter was put in your blood vessel. Then the area may be covered with a bandage or a compression device. This will prevent bleeding.
  • Your care team will check your heart rate and blood pressure. They will also check the catheter site for bleeding.
  • You will need to lie still and keep your leg straight for several hours. A weighted bag may be put on your leg.
  • You may have a bruise or a small lump where the catheter was put in your blood vessel. This is normal and will go away.

When should you call your doctor?

  • You have questions or concerns.
  • You don't understand how to prepare for your procedure.
  • You become ill before the procedure (such as fever, flu, or a cold).
  • You need to reschedule or have changed your mind about having the procedure.

Care instructions adapted under license by your healthcare professional. If you have questions about a medical condition or this instruction, always ask your healthcare professional. Healthwise, Incorporated disclaims any warranty or liability for your use of this information.