Maze Procedure—Open Surgery
by Amy Scholten, MPH
Maze is a type of heart surgery. It is done through the upper chambers of the heart. The chambers are called the atria.
Reasons for Procedure
Maze is done to treat atrial fibrillation. Fibrillation is abnormal beating of the heart muscle.
Maze is used to treat severe cases that were not helped by medicine and other procedures.
Problems are rare, but all procedures have some risk. The doctor will go over problems that could happen, such as:
Things that may raise the risk of problems are:
What to Expect
Prior to Procedure
The surgical team may meet with you to talk about:
The doctor will give general anesthesia. You will be asleep.
Description of the Procedure
An incision will be made through the skin and breastbone. The chest cavity will be opened. Next, the heart will be connected to the heart-lung machine. This machine will take over the functions of the heart and lungs during surgery. Once the machine is active, the heart will be stopped.
Small incisions will be made in the upper chambers of the heart (atria). The incisions may look like a maze. They will direct the electrical impulses. The incisions will be closed with sutures. In some cases, a pacemaker may need to be placed.
Once the maze-like pattern is complete, the heart will be restarted. When the heart is working well, the heart-lung machine will be removed. The chest will be closed with wires. Finally, the skin will be closed with sutures. A bandage will be placed over the site.
How Long Will It Take?
About 3 hours
Will It Hurt?
Medicines will help ease any pain and discomfort.
Average Hospital Stay
5 to 7 days
At the Hospital
After the procedure, the staff may:
If a pacemaker was placed, you will be given instruction on its care.
During your stay, the hospital staff will take steps to lower your risk of infection such as:
There are also steps you can take to lower your risk of infection such as:
Recovery takes up to 6 months. Certain activities will be limited during this time.
Call Your Doctor
Call your doctor if you are not getting better or you have:
Call for medical help or go to the emergency room right away if you have:
If you think you have an emergency, call for medical help right away.
American Heart Association
Heart Rhythm Society
Canadian Heart Rhythm Society
Heart and Stroke Foundation of Canada
Atrial fibrillation. EBSCO DynaMed website. Available at: https://www.dynamed.com/condition/atrial-fibrillation. Accessed July 20, 2021.
Cardiac rhythm disturbances. Society of Thoracic Surgeons website. Available at: https://ctsurgerypatients.org/adult-heart-disease/cardiac-rhythm-disturbances. Accessed July 20, 2021.
García-Villarreal OA. Standardization in maze procedure: a step towards a better future. J Thorac Dis. 2018;10(Suppl 33):S3887-S3889.
Maze procedure for treatment of atrial fibrillation. University of Michigan Health website. Available at: https://www.uofmhealth.org/health-library/tv6752. Accessed July 20, 2021.
Maze surgery. Texas Heart institute website. Available at: https://www.texasheart.org/heart-health/heart-information-center/topics/maze-surgery. Accessed July 20, 2021.
Last reviewed July 2021 by EBSCO Medical Review Board Michael J. Fucci, DO, FACC
Last Updated: 7/20/2021