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Maze is a surgical procedure in which areas of the heart are cut to create a "maze" of scar tissue that prevents the erratic electrical signals from passing through the heart. It is often used to treat atrial fibrillation.

During the procedure, several incisions are made on the atria to form scar tissue to disrupt the path of abnormal electrical impulses and prevent the recurrence of erratic electrical signals. Once these incisions are made, the atrium is sewn together so that it can hold blood and contract to push blood into the ventricle.

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