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Maze Procedure (Surgical Ablation) for AFib

Medically Reviewed by Brunilda Nazario, MD on February 25, 2021

What Is the Maze Procedure (Surgical Ablation)?

If you have an irregular heartbeat caused by atrial fibrillation (AFib), you may need surgery to make your heart rhythm normal again. This is called the maze procedure, or surgical ablation.

It’s usually a treatment your doctor will try if other things like medications, cardioversion therapy, or catheter ablation have not worked. Most people who have AFib will not need the maze procedure.

What Happens During a Maze Procedure?

Your doctor will access your heart through your chest and make small cuts in the heart tissue. Scars will form. They make a path for electricity in your heart to follow. Your heartbeat will become normal in time.

Types of Maze Procedures

Different types of maze surgery include:

  • Open-heart maze procedure: If you need valve or bypass surgery for heart disease and you have AFib, your surgeon may do a maze procedure during your open-heart surgery. Your surgeon will have to break your breastbone, open your chest, and stop your heart to perform this surgery. The doctor will put you on a heart-lung machine to stay alive during this procedure. This is the most common type of surgical ablation.
  • Minimally invasive maze surgery: Many people with AFib can have this type of surgery. It involves small cuts called keyholes so your surgeon can get to your heart. They will use energy, either heat or cold, to make scar tissue on your heart. This procedure can be performed while your heart is still beating. Your surgeon may use a tiny video camera to help see inside your heart while making cuts and scar tissue.
    • Robotically assisted maze surgery: This is a type of minimally invasive maze surgery. Your surgeon may use a robotic tool to help do ablation. These tools are slightly different from the ones used in minimally invasive surgery.

How Should I Prepare for My Surgical Ablation?

Don’t smoke for at least 2 weeks before your heart surgery. It may cause problems with your breathing or blood clotting during or after your procedure.

The night before your surgery, bathe or shower. Don’t eat after midnight the day before your surgery. Food or drinks in your stomach may cause you to have problems with your anesthesia. It can cause you to vomit and breathe it in.

What to Expect Before and During the Maze Procedure

At the hospital, your nurse may test your blood or urine, or give you a chest X-ray to make sure you don’t have any infections or problems that may hurt your surgery’s success. You may be given medication to help you relax before the surgery.

You’ll have electrocardiogram (EKG) electrodes attached to your chest and back to keep track of your heartbeat. You will get anesthesia to put you to sleep during the surgery.

After you are asleep, your doctor will connect you to a respirator that has a tube that goes down your throat. This will help you breathe during the operation. You may have a tube inserted into your throat to help collect fluid or air in your stomach during the operation. You may also have a catheter inserted in your bladder to collect urine during the operation.

Your surgeon will cut into your chest during your operation, and they will insert instruments to make the small interior cuts or make lesions on your heart tissue. Depending on the type of maze procedure you have, your surgeon may use tiny video cameras or robotic arms to help perform the operation.

What Happens After the Maze Procedure?

After maze surgery, you will probably have to stay in the intensive care unit of your hospital. After, you may need to stay up to 5 days in a regular hospital room. There the staff will monitor your heartbeat and recovery.

After surgery, you may take diuretic drugs. They help control fluid in your body after the surgery. You may also take blood thinners or aspirin to prevent clots.

Open-heart surgery will take the longest to recover from. It can take many weeks to heal. If you have a minimally invasive maze procedure, you may have a quicker recovery than with open-heart surgery. You should be able to leave the hospital in 2 to 4 days. You can go back to normal activity after a few weeks.

For about a month after whichever surgery you have, don’t take very hot showers. Avoid soaking in a bath or whirlpool tub. Your surgical wounds may itch or feel numb or tight. You may have chest discomfort for a few weeks as your body heals. If you notice signs of infection around your wounds, such as redness, fever, swelling, or heat, call your doctor.

It may take a few months for your heartbeat to be normal again after the maze procedure. Your doctor will monitor your heartbeat to check how you’re doing. At first, you’ll see them a few weeks after your surgery. Then you will see them for checkups every few months for the first year. You should see them once a year after that.

WebMD Medical Reference

Sources

SOURCES:

Cleveland Clinic: “Surgical Procedures for Atrial Fibrillation (MAZE).”

University of Southern California Keck School of Medicine: “A Patient's Guide to Heart Surgery,” “Robotic-Assisted MAZE Surgery.”

Society of Thoracic Surgeons: “Atrial Fibrillation Surgery - Maze Procedure.”

Cedars-Sinai Hospital: “Preparing for Maze Surgery.”

American Heart Association: “Treatment Guidelines of Atrial Fibrillation (AFib or AF).”

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